Obviously getting enough sleep, eating healthy, and listening to your body helps. But I think the main thing that helps me is my routine before a run.
eat something light (cereal, toast, or a granola bar)
brush my teeth and blow my nose (you have no idea how bad this would drive me crazy if I didn't do it)
get all my gear ready to go (Nike band, ipod, mace, and WATER)
During my run, for the first time ever, I ran with water. Josh bought me a Nathan Hydration belt and it made all the difference. I like the pouch to hold my phone, car key, chap stick, and gum.
After my run I always drink low fat chocolate milk, stretch, and then eat lots of greens, lean proteins, ice cream=) and of course drink a lot of water. I wonder if Josh would mind if I wore the hydration belt on our Saturday errands??
What's your running routine?