Peanut butter and toast is great if you have a good hour before you go run. If I have less time, a half a banana is perfect (if I'm running for an hour or less, that is). If you can afford them, energy gels are wonderful - they digest fast and give you a quick boost without danger of getting a sidestitch, usually (eating much causes this for me).
Oh how I once loved tuna salad
Pork and lobsters, lamb chops too
'Til I stopped and looked at dinner
From the dinner's point of view.
--Shel Silverstein
Run, world, run.