When it comes to sleep and exercise the jury is in: Working up a good sweat is an important ingredient for getting a good night's sleep. When it comes to the timing of that workout, it's a little more complicated.

Exercise of any sort has generally been shown to improve daytime sleepiness. This is true for just about every population that has been studied, from healthy teens who took up running to inactive people who began pilates.

Taking a road trip is an exciting way to travel, but make sure that sleep is on the agenda. Drowsy driving causes about 72,000 car accidents each year, and being sleepy at the wheel can be just as dangerous as driving while drunk.