One great way to take a break for someone like me is just to play a few games. These can sometimes be a boardgame amongst friends (usually 'eurogames' and other light strategy games or simply computer and video games. If I'm really lucky, I get to play in a good old pen-and-paper type RPG. Unfortunately, these for me are actually few and I'm currently playing in Supers-RPG a couple of times a month. Of course, I could always run my own game (once more) which is a rarity these days. However, I don't necessarily consider running a preparing a game exactly a break from the sort of projects I do with Arcana Creations -- sometimes it just feels like an extension of it. Playing is always a different matter. I do run stuff and it will be stuff that I am developing for publication and it's always nice to see player reaction to something we have just released or about to publish.
I think in a lot of cases, the key is play.
For me, playing a good deal of StarCraft II when it came out got me really charged up about Sci-Fi. Recently, I've been playing an RPG on the X-Box which is very 'Classical Greece' and it's gotten me thinking of actually running a mini-campaign in the Golden Age of Ancient Greece. Of course, reading great books and movies are also a great way to recharge but I feel that the time spent with those is proportional to the amount one will 'get back'.
Of course, the other way to keep you going is to work on different projects. Right now, I'm working on a couple of projects dealing with the Superhero genre. This is not my principal preferred genre but both are different enough (and one of the two is a short term project to help out). This certainly helps. Of course, if inspiration happens to strike with something else, by all means get some of that out of your system! It might have a great way to motivate you on your original projects and make you feel good about all the work that you are doing.