After a year of running 1 to 2 hours a day around the same neighborhood loop, the small children your neighbors have write the word "run" with sidewalk chalk all over your route.
PS: I'm not kidding. I loved it.
You think that a box of poptarts and a quart of milk is a complete meal!
You know where the cheapest place for PowerBars is in your city. (WAL MART!)
You look at Paul Tergat and Daniel Komen, both who look like famine victims, and you think "Damn! I wish that I could have a body like that!"