Pick up Mein Kampf, its a hell of a great read if you know the backdrop of WWI and WWII and are interested in either of the wars.
If you're really that addicted, just play something simple yet time-burning like... This forum.
Or download a nice movie on iTunes.
Cube Runner is also a viable option lol
Counter-Strike: Source is a great way for me to get an hour or two of nice gaming; there are servers that aren't combat and are pretty chilled out like bunny hopping (<3) and RPG mods.