1. Music
2. Upcoming races and if I was to run the race at the pace I am currently running, what would my final time be
3. How long/which direction I want to run. Usually I start out with a plan for distance/route, but sometimes along the way I'll change my mind--either I feel tired and decide to cut it short, or I'm feeling better than I thought and decide to extend...sometimes traffic will cause me to stop for a while and instead I decide to go a different direction so I don't have to wait, etc.
4. Fantasize about winning (or at least placing in my age division) my next race--TOTAL fantasy, will never happen!
5. Fantasize (in general!)