Maria, I suggest you watch Brad Anderson's "The Machinist" (2004). While it is not the kind of film that is going to put you to sleep, it will most likely make you seriously ponder the causes and consequences of chronic insomnia. It is a great drama (with an outstanding performance by a barely recognizable Christian Bale) and certainly more enjoyable than Chris Nolan's 2002 (questionable) remake of "Insomnia". The latter may induce sleep, however, so don't rule it out!
As far as home remedies are concerned, lavender essential oil can work wonders (I use a lavender-vanilla blend that is simply irresistible on any restless night). Stress-related conditions, including occasional sleeplessness and insomnia, can respond very well to aromatherapy. You just need to make sure that you use pure essential oils, not merely scented oils... Aromatherapy is not junk science or a silly grandma recipe; it just works!
You can prepare an inhalation and enjoy it for 10 minutes prior to going to bed. You may also use a few drops of a given oil or blend several oils in a hot bath and relax, then go to bed with a peaceful mind – for me, that does not work because I am wide awake again by the time I have dried off, cleaned the tub (the oily residue can be dangerous for the next user), and made it back to the bedroom...
I prefer using essential oils for skin application (e.g., massage, chest rub). The oil or oil blend must be diluted in a vegetable carrier oil (though lavender, tea tree, and ravensara essential oils may be applied directly to the skin, in small doses only). For a good base oil, I recommend sweet almond oil, preferably pressed from raw almond kernels with a natural expeller, which is very rich in vitamins and fatty acids (amongst others) and just wonderful for your skin. Another great option – especially for sensitive, inflamed, and more mature skins – is apricot kernel oil. It is full of oleic and linoleic acids, essential fatty acids, and vitamins A & E... Use 7 to 10 drops of essential oil for 25mL (app. 5 teaspoons) of carrier oil and massage onto your temples, forehead, neck, shoulders, and chest.
Pure essential oils that can help you de-stress and sleep better include:
Roman chamomile oil + geranium oil in a bath + a nice cup of chamomile tea (infusion, really – a great, gentle sedative) / Do not use chamomile if you are taking certain meds (such as blood thinners) or if you are allergic to ragweed!
Lavender, neroli, sweet marjoram, rose: can be used in your bathwater, too (individually)
On your sheets and inside your pillowcases (NB: spray onto dryer sheets or a handkerchief first), you can try the following:
Benzoin resin or frankincense (useful to fight sleeplessness caused by worry, emotional exhaustion, and tension)
German or Roman chamomile (to calm nerves & stomach and induce sleep)
Jasmine (very relaxing and soothing, sedative, antidepressant, aphrodisiac –won’t help you sleep much–, and expectorant) – I’m with Charlie re: jasmine tea!
Lavender (calming, soothing to nerves & digestion, anti-depressant, great pain-reliever if you have anything from a headache to an earache or stomach cramps, good to lower blood pressure)
Melissa (relaxing, natural mood upper, efficient to counter anxiety and lower blood pressure, helps with digestion, menstrual cramps, and indigestion)
Neroli (very relaxing, useful against insomnia caused by anxiety, depression, irritability, panic, shock)
Rose (relaxing and soothing, nervous & digestive tonic, but it is also an aphrodisiac so use sparingly unless there is a sex drive issue at stake, too)
Sandalwood (relaxing, aphrodisiac, antidepressant, expectorant, digestive effect)
Sweet marjoram (warming and comforting, great sedative that also helps with digestion, muscular and joint pain, and nervous functions)
Ylang ylang (soothing, antidepressant, nervous system tonic; good to lower blood pressure and counter excitability, possibly after trying rose oil and sandalwood oil together

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As for hot beverages, if jasmine tea does not work or warm milk makes you sick, try a valerian root infusion (you may add lemon verbana to it, for taste, but valerian by itself should suffice to knock you out) or a tisane made with catnip and mint. Whereas store-bought, prepackaged herbal teas have no effect on me (except for the diuretic effect SwissKiss mentioned above), these two can be quite efficient... This being said, results vary from person to person, much like sleep patterns and disorders do. Try a few potential solutions if the problem persists and eventually you will find what suits you best. It could actually boil down to exercising more often, taking up yoga and/or meditation, eating differently (or at different times), listening to music, setting aside more quality time for or by yourself away from the rat race (vacation time!), and ridding yourself of negative or work-related thoughts before you go to bed.
I used to sleep through anything (even an earthquake once), but nowadays my sleep is much lighter and I sometimes find it very difficult to fall asleep again once something has interrupted my night. My mind starts racing and I just cannot shut my brain off. It has taken many efforts to essentially teach myself how to disconnect completely, and not think about my to-do list or all the life events that can really be dealt with the next day. On most nights now, I use conical foam ear plugs (the bright ones made by Quiès) to help block out ambient noise, including the peaceful breathing of the heavy sleeper next to me in bed, and happily focus my mind on "easy" thoughts. Nothing too demanding -- just light, fun stuff, such as cheerful songs or a favorite classical music piece, movies I have watched recently, hikes I have been on or want to enjoy soon, yummy treats I want to cook or bake the following weekend, etc. I have noticed that concentrating on fictional characters, music or fun actions & places -- instead of people I know in real life -- helps a lot. When I cannot link individual, familiar faces to given events or specific discussions, I do not trigger any sleep-disturbing thoughts (unpleasant or not) and therefore manage to effectively and efficiently escape from my daily routine before drifting away. That is apparently the key to a restful night for me...
What I do not recommend is turning on the television or jumping online, as you apparently did yesterday. At night, turning off electronic devices and giving your eyes & brain some rest away from screens is a
must! I really enjoy dim lights (in the morning, too!) and quiet environments in general. Our senses are assaulted all day long and we are hyperstimulated even when we do not realize it, so take control where you can once you get home. Opt for candles, relaxed conversations with your husband, and so on -- no harsh stimuli for at least 30-45 minutes before bedtime!
Another harmful approach is trying to force your body to re-adapt to "normal" hours by staying up for over 24 hours and tricking it into a supposedly more functional rhythm. This will mess up your cycle even more...
Try to make sure your bedtime (whatever it may be) is focused on actually winding down and finding good-quality, peaceful sleep. Do
not concentrate on the fact that you cannot fall asleep "yet again", or else you will end up getting upset and an episode of sleeplessness (transient insomnia) may very well turn into a short-term problem (acute insomnia) and then chronic insomnia (lasting for more than a month) with all the crippling functional impairments it brings while you are awake (incl. hallucinations and extreme muscular fatigue).
This takes me back to your first sentence re: "a bad case of insomnia". Have you been officially diagnosed with primary or secondary insomnia, or are you using the word because your inability to fall or stay asleep is bothering you?
Poor sleep quality is not the same as insomnia, and it can be caused by a variety of factors: sleep apnea, depression, restless leg syndrome, hormone shifts, poor sleep hygiene (e.g., if you live in a noisy environment), parasomnias, etc.
Sleep-onset insomnia (i.e., inability to fall asleep when you go to bed) is often related to anxiety disorders and it is different from delayed sleep phase disorder; you probably cannot tell which is which, but a (good) physician will know the difference.
Middle-of-the-night insomnia, on the other hand, can be a symptom of an illness or pain disorder that would require professional attention.
Terminal insomnia (i.e., end-of-sleep-cycle insomnia) is usually linked to clinical depression...
Insomnia is often misdiagnosed, and very often comorbid with other psychological or mental disorders, physical conditions, and even subjective issues you may not be aware of at all. Whatever your case may be, there are multiple treatment courses that require neither drinking liters and liters of herbal tea nor taking habit-forming medication. The last thing you need is to become hooked on prescription sleep aids! Just try some natural approaches first in order to determine what works for you.
On that note, one last piece of friendly advice -- if this problem continues, go to a
sleep clinic (a.k.a. sleep lab or sleep center) if you wish to (1) know more about why you cannot sleep soundly or long enough and (2) get some professional guidance on how to overcome your sleep disorder. They will be happy to have a new guinea pig and you will come out of there with answers and (hopefully) peace of mind. You may learn a lot about yourself in the process and your body & soul will be grateful when you can finally sleep well. Typically you have to stay overnight so they can properly observe you and analyze your sleep cycle, disruptions and so on, but it is definitely worth your time!