I really enjoy checking in on foursquare and gowalla. Unfortunately the internal GPS runs my phone battery down in a heartbeat. My charger was a 1/2 mile hike away so I had to live with a dead phone.
Life is kind of like that, too. We can sometimes do the things we really enjoy, but we have to see if the toll they take on our mental, physical, and spiritual batteries is worth it.
And sometimes we can get an external boost. I need to break down and finally buy the iGo charger that @superjennblogs raves about.