This is good tip I found on Babycenter.com about toddlers and sleep habits. Enjoy.

Part of helping your toddler learn good sleep habits is teaching him to fall asleep on his own. But even the best sleepers sometimes need a little extra assistance — which is where sleep aids come in. These techniques and products run the gamut from a teddy bear to a glass of warm milk, but all share a common purpose: helping your toddler get to sleep. But although sleep aids are often useful, some come with a downside, too. You want your child to learn to get to sleep by himself, not depend on the presence of a particular product or condition.

Look below to find a sleep aid that's right for you and your toddler. (A word of caution: Never give your child sleeping pills or other drugs that encourage sleep without consulting his doctor first — it may not be safe or effective. Most experts also frown upon giving herbs to toddlers, since no safe pediatric doses have been established and they could be toxic in high doses.)

Tried and true

Choose one of these sleep aids and you can't go wrong — all will help your toddler fall asleep without leading to any problems or bad sleep habits.

Thumb sucking
Thumb sucking is a perfectly acceptable way for your child to comfort himself, at bedtime or any other time — although it can lead to dental problems in older children. Thumb sucking is a way for a toddler to soothe himself, not only when he's sleepy but also at other times of the day.

Nightlight
Many toddlers get disoriented and upset when they wake up at night in a dark room and can't see anything they recognize. Luckily, there's a simple solution: A night-light will reassure your child that he's in familiar surroundings and help him settle himself back to sleep. Get in the habit of flipping it on as you're getting him ready for bed. Any kind will do, though some fancy models include a tape or CD player you can attach to your toddler's crib.

Bedtime ritual
The experts all agree: One of the best ways to help your child make the transition to bedtime and sleep is to establish a calming, consistent bedtime ritual. Your ritual can include any (or all) of the following: giving your toddler a bath, playing a quiet game, helping your child into his pajamas, reading a bedtime story or two, singing a lullaby, and giving him a kiss goodnight. Whatever routine works for your family is fine, as long as you do it in the same order and at the same time every night. Setting and sticking to a consistent bedtime — on weekdays and weekends alike — is key to establishing good sleep habits.

Transitional object
Your toddler may fall asleep more easily if he has a soft, cuddly blanket or stuffed animal nearby to keep him company. According to T. Berry Brazelton, author of Touchpoints, toddlers who learn to comfort themselves with loveys (as he calls them) are demonstrating their inner strength.

Warm milk
Drinking a glass of warm milk before bed is a time-tested way to fall asleep. The amino acid l-Tryptophan (found in milk and other foods, such as turkey and eggs) is thought to play a role in making you sleepy by raising the level of serotonin — a sleep-inducing chemical — in the brain, though the benefits may be purely psychological. Be sure not to let your toddler take a bottle or sippy cup of milk or juice to bed with him, though, since that can lead to cavities.