I generally take a daily nap due to my disability. It's a very mild condition, but it makes me a little more tired, so an hour or so of napping a day is refreshing. It's healthier than my old habit consuming nearly a gram of caffeine over the course of the day.
Traditionally, it's theorized humans evolved to sleep multiple times daily and nightly. However, for modern life, it may not be a good idea to nap if it keeps you up at night, because we aren't cavemen and we have to go to work, which is difficult if we're awake all night from an afternoon nap.
In terms of other things that can help daily energy levels, a morning workout can perk you up once you get used to it. It's exhausting at first, but once the body gets used to it the endorphins and physical activity give you a burst of energy for the rest of the day.