Naps sometimes get a bad rap. If you take them shortly before bedtime, you may make it harder to get to sleep for the night. This is probably because sleep pressure, in the form of adenosine, builds up during the day. When you take a nap after dinner, that sleep pressure disappears.

However naps―and a new, free app that makes lighting recommendations when you travel―can help. These ideas may be just the ticket to combat jet lag.  Story here.