2. Pay attention to what you eat and drink

Don't go to bed hungry or stuffed. In particular, avoid heavy or large meals within a couple of hours of bedtime. Discomfort might keep you up.

Nicotine, caffeine and alcohol deserve caution, too. The stimulating effects of nicotine and caffeine take hours to wear off and can interfere with sleep. And even though alcohol might make you feel sleepy at first, it can disrupt sleep later in the night.