The only time I'm really bored is when I can't decide what to do, because of the "paradox of choice." My personal library has more than enough books to keep me busy for the next couple of decades, and the Internet provides a seemingly unlimited amount of reading material. That alone creates a strong "paradox of choice" situation, but I also like listening to music (classical and metal, recorded or live), going to the theater, running, mountain biking, hiking, going out to eat, hanging out with friends at bars/clubs, etc. And between physical media and bittorrent downloads, I have enough unwatched movies and TV programmes to consume hundreds of hours of my time.<p>So what do I actually do? Usually some combination of the above... an average weekend includes some time reading fiction (reading the "Harry Potter" series ATM), some time studying $SOMETHING, where $SOMETHING could be greek history, philosophy, physics, math, statistics or FSM knows what, and some time boning up on whatever the technical "topic of the day" is... some time surfing the Internet, a trip out to eat somewhere, and some time exercising (walking or running).<p>I don't know if that helps much or not, but there ya go. If I had to single out one activity that I spend the most time on during "idle time" it's reading, both fiction and non-fiction.<p>Oh, and never mind the time on weekends that I spend writing code.<p>Now that I think about it, no wonder I show up for work on Monday feeling <i>more</i> tired than I was when the weekend started. :-(