An enjoyable sidekick to bicycle commuting is bicycle maintenance, building, hacking. This can become just as addicting as cycling itself. I can't pass a bicycle with out checking out its make,model, how its set up, or how its owner has tricked it out.
For your study and enjoyment, I have provided some web links that have helped me learn how to assemble, repair, and hack on my bikes. One thing for sure is YOUTUBE has helped me learn allot of what I know as well.
Also a few pics of my basement bike shop where I spend many enjoyable hours working on bikes, listening to music, and drinking "barley pops."