I drive lots on the weekends, so I listen to podcasts. I'm currently listening to "Behind the Bastard" and I'm spending time here and there reading up on very dark history that I was never taught in any level of school.

So to answer your question, podcasts and reading! I've also made lists and info sheets on all sorts of things like what to look for in health food supplements, what my regiment is when I'm sick, list of books to read, ideas for birthday gifts, price comparisons.. I also recently bought a Kalimba so that's keeping me busy, too. It's an instrument that's easy to carry, so I dream of being able to play it by a camp-fire since I am hopeless at guitar.