You can't get where you're going unless you know where you've been. Record your training on a daily basis. In my office, I have a set of loose-leaf notebooks dating back to 1963. I record items such as the date, time, location, surface and conditions, and distance, along with my weight. I also record what I did to warm up and cool down, and any comments concerning the actual run. Various running diaries can be purchased at book stores. Or you can even record your miles on a simple calendar. After you race, you can look back on your training and figure out what you did wrong--or what you did right.