Interesting article on the pros and cons of napping. Link is below.
I am a skilled napper and I am a proponent of 30 minutes maximum. Any longer and I feel groggy and my night sleep is disrupted.
Naps are refreshing and control your appetite.
If you hit the mid-afternoon blahs try to catch a snooze, rather than wake yourself up with sugar and caffeine.
Naps are great, but as the article states, quality nighttime sleep is most important.
Hockey pre-game nap as outdated as wood sticks, wool jerseys: Calgary sleep doctor