Tryptophan. Tryptophan is a basic amino acid used in the formation of the chemical messenger serotonin, a substance in the brain that helps tell your body to sleep. L-tryptophan is a common byproduct of tryptophan, which the body can change into serotonin. Some studies have shown that L-tryptophan can help people fall asleep faster. Results, however, have been inconsistent.

An average adult needs between 7.5 and 8 hours of sleep per night. “But many people can function with 6 hours' sleep, and there also some who need 9 hours or more,” says Sudhansu Chokroverty, MD, professor and co-chair of neurology and program director for clinical neurophysiology and sleep medicine at the New Jersey Neuroscience Institute at JFK Medical Center in Edison, N.J.

How valerian and hops help sleep: You can use valerian and hops separately to treat sleep problems. Valerian has been shown to help people fall asleep more quickly, reduce restless sleep, increase sleep amounts, and improve symptoms of insomnia. Research also shows valerian is effective in treating sleep problems linked to menopause. Hops itself can increase sleep time. Studies show these herbal supplements pair well together: according to research, hops may be more effective for sleep when in combination with valerian.
Melatonin supplements are widely recommended for various sleep conditions, but the best evidence is for help with sleep problems caused by shift work or jet lag. Melatonin is a naturally-occurring hormone that regulates the sleep-wake cycle in the brain. It is produced from serotonin when exposure to light decreases at night. It is used in conditions where sleep is disordered due to low levels of melatonin at night such as aging, affective disorders (e.g. depression), delayed sleep-phase disorder, or jet lag. 
Cough-and-cold products have not been shown to be safe or effective in children younger than 6 years. Therefore, do not use this product to treat cold symptoms in children younger than 6 years unless specifically directed by the doctor. Some products (such as long-acting tablets/capsules) are not recommended for use in children younger than 12 years. Ask your doctor or pharmacist for more details about using your product safely.
Set a regular bedtime. Going to bed at the same time each night signals to your body that it's time to sleep. Waking up at the same time every day also can help establish sleep patterns. So try to stick as closely as you can to your sleep schedule, even on weekends. Try not to go to sleep more than an hour later or wake up more than 2 to 3 hours later than you do during the week.
There is usually no particular biological or health reason to worry about sleeping less or more than other people. Your spouse might get mad at you if you sleep too much and you might get into hot water if you nap on the job, but most people have no reason to worry about going outside the norms when it comes to sleep duration. You might think sleeping too much is a problem, that excessive sleep is a waste of time, and indeed hypersomnia is recognized as a clinical condition. But not all long sleepers can be classified as hypersomniac and in any cases, there is nothing doctors can do for hypersomnia except prescribe stimulants. So it may not be worth worrying about.
Studies have shown that exercise during the day can improve sleep at night. When we exercise, we experience a significant rise in body temperature, followed a few hours later by a significant drop. This drop in body temperature makes it easier for us to fall and stay asleep. The best time to exercise is late afternoon or early evening, rather than just before bed. Aim for at least 30 minutes four times a week. Aerobic exercises are the best to combat insomnia as they increase the amount of oxygen that reaches the blood.
Benzodiazepines are the oldest class of sleep medications still commonly in use. Benzodiazepines as a group are thought to have a higher risk of dependence than other insomnia sedative hypnotics and are classified as controlled substances. Primarily used to treat anxiety disorders, benzodiazepines that have been approved to treat insomnia include estazolam (brand name ProSom), flurazepam (Dalmane), quazepam (Doral), temazepam (Restoril), and triazolam (Halcion).
It seems like sleep should come naturally. But when it doesn't, you might quickly find yourself pleading, "Help me sleep!" It can be a frustrating, unnerving experience to have insomnia, characterized by difficulty falling or staying asleep. You might lie awake for hours in bed at night. When you awaken without feeling refreshed, this problem quickly becomes a drag on the rest of your life and health.
Diphenhydramine is an antihistamine used to relieve symptoms of allergy, hay fever, and the common cold. These symptoms include rash, itching, watery eyes, itchy eyes/nose/throat, cough, runny nose, and sneezing. It is also used to prevent and treat nausea, vomiting and dizziness caused by motion sickness. Diphenhydramine can also be used to help you relax and fall asleep.
STRESS: When you’re stressed, your flight-or-fight response is active during the night, and your sleep quality is going to be shallow. It’s natural: If you have kids, you are programmed to be able to respond to your environment during the night to make sure you’re not getting eaten by a predator. Parents have this issue when their fight-or-flight response system is overly activated by worrying about their kid, and that worry actually makes their sleep quality worse.
Chang, A. M., Aeschbach, D., Duffy, J. F., & Czeisler, C. A. (2015, January 27). Evening use of light-emitting eReaders negatively affects sleep, circadian timing, and next-morning alertness. Proceedings of the National Academy of Sciences, 112(4), 1232–1237. Retrieved from
The following steps are organized to provide you guidance and support in your efforts to sleep better. It can be implemented over the course of a month, with different tasks assigned to each of the 30 days. Major changes are spaced out in the schedule to allow prior tasks the time needed to take effect. Most of the first week, for example, focuses on improving your sleep environment after the recommendation to fix your waking time is in place—but some of the groundwork laid through self-reflection this week will provide a foundation later on. Similarly, as is later recommended, creating a relaxing buffer zone and going to bed when you feel sleepy will take some effort, while simultaneously rearranging the use of substances may come easier.
An ultra short episode of sleep is sufficient to promote declarative memory performance. Lahl O, Wispel C, Willigens B. Journal of sleep research, 2008, Apr.;17(1):1365-2869. But try to avoid napping after 3:00 or 4:00pm, as this can make it harder to fall asleep at bedtime. Effects of afternoon "siesta" naps on sleep, alertness, performance, and circadian rhythms in the elderly. Monk TH, Buysse DJ, Carrier J. Sleep, 2002, Feb.;24(6):0161-8105.
Like all drugs, natural sleep remedies can have side effects and risks. Pre-market evaluation and approval by the FDA are not required for OTC aids, dietary supplements, or herbal products. The particular brand you buy may have inappropriate dosing. You may get less or more of the herb than intended, which could make it dangerous to use in treatments, especially for children or the elderly,

The pineal gland, located within the brain’s two hemispheres, receives signals from the SCN and increases production of the hormone melatonin, which helps put you to sleep once the lights go down.  People who have lost their sight and cannot coordinate their natural wake-sleep cycle using natural light can stabilize their sleep patterns by taking small amounts of melatonin at the same time each day.  Scientists believe that peaks and valleys of melatonin over time are important for matching the body’s circadian rhythm to the external cycle of light and darkness.

Block out unwanted noises. Noise can impact your ability to get to sleep as well as your overall sleep quality. Try listening to a radio program or podcast that's not too engaging to help block out noise distractions such as traffic, as well as worrisome thoughts. Listen to something that is soft-spoken instead of loud, and something you enjoy but not so much that you will stay up just to listen to it. Recommended podcasts include: [4]

One reviewer says that the Stress-Relax Tranquil Sleep Chewable Tablets have helped calm him down and stopped his mind from spinning when lying in bed. Someone else says that the tablets even help him get better sleep when having panic attacks. Try the Stress-Relax chewables for your own anxiety, but remember to see a professional if you feel that your stress is too much to manage. 
You’ve got an early day tomorrow, and you know you should be asleep — but instead you’re just lying there, wide awake, watching the minutes tick by on the clock. It’s called sleep-onset insomnia, and the irony is, the more you worry about falling asleep, the less likely you’ll be able to. But there are some easy things you can do to break the cycle. Below we discuss simple changes to your lifestyle and your sleep environment that can help you fall asleep faster and get a more restful night’s sleep.