Good napping tips

• Nap between 2-4 p.m. when you have the natural sleep drive and it won't disturb night sleep.

• Don't nap in the early evening when your sleep clock is counting down for a good night's sleep. It will mess with your normal sleep pattern.

• If you're napping in the mornings there's something wrong with your sleep. You should be alert after you've slept.

• Often, a short nap of 15 or 20 minutes is equally or even more refreshing than a longer nap. More than 30 minutes and you may feel worse.

• Teenagers are biologically wired to nap because they're sleep deprived. Teens need about an hour of sleep more than adults to feel rested. Their sleep clock also resets to a later sleep time, so they're night owls.

SOURCE: Dr. Lydia Wytrzes, director of Sutter Sleep Center in Sacramento and certified sleep specialist.