i would simply never write at all. i remember before i joined hubpages, i used to write film reviews for fun, but i was going to stop doing that, as i was starting to see it as a waste of time. then when i saw hubpages, i thought it was an interesting way to make money. however, i did gain a lot more than that though from hubpages, as i met a lot of good people here. many of which hardly ever log on anymore, but still good people nonetheless.
however, to answer your question, i'd probably just watch tv or waste my time playing games during my free time.