怎样拥有良好的睡眠？

Caffeine and nicotine are stimulants that interfere with your ability to fall asleep. Coffee, tea, cola, cocoa, chocolate and some prescription and non-prescription drugs contain caffeine. Cigarettes and some drugs contain nicotine. Alcohol may seem to help you sleep in the beginning as it slows brain activity, but you will end end up having fragmented sleep.

• Have a light snack before bed

If your stomach is too empty, that can interfere with sleep. However, if you eat a heavy meal before bedtime, that can interfere as well. Dairy products and turkey contain tryptophan, which acts as a natural sleep inducer. Tryptophan is probably why a warm glass of milk is sometimes recommended.

• Take a hot bath 90 minutes before bedtime

A hot bath will raise your body temperature, but it is the drop in body temperature that may leave you feeling sleepy. Read about the study done on body temperature below.

Trouble Sleeping? Chill Out! - A press release from the journal Sleep about the significance in body temperature before sleep

• Make sure your bed and bedroom are quiet and comfortable

A hot room can be uncomfortable. A cooler room along with enough blankets to stay warm is recommended. If light in the early morning bothers you, get a blackout shade or wear a slumber mask. If noise bothers you, wear earplugs or get a "white noise" machine.

• Use sunlight to set your biological clock

As soon as you get up in the morning, go outside and turn your face to the sun for 15 minutes.