The big answer in my case is: MY VERY COOL and UNDERSTANDING HUSBAND.
It's hard to be married to a runner and bicycling nut who is always training.
Also, I hate to run as soon as I get up. (Oddly, I like to bike first thing.) I always seem to want to get up two hours before a run or race. Not liking to run first thing is kind of a drawback, I admit!