When I run, it's in the morning. Usually before I eat, or depending on my work schedule it may be an hour or two after I eat.

Always I have my coffee. (first thing I do when I get up is make coffee. I am an addict. Caffeine is my friend)

If I'm hungry but need to run RIGHT THEN I will eat a few Clif Bloks. Nice thing about the Bloks is they don't upset my stomach and they don't send my blood sugar on a roller coaster. (and you don't have to eat a full serving, like with gels) No gluten.

Larabars are my other fuel of choice, but they are too heavy for me
to eat before a run. As noted, also no gluten. Costo sells 'em by the case. SKnot eats them, and I have to hide some for my bike rides.

Mind you, my morning runs are only maybe 30 minutes tops. My morning bike rides (where I really do need to eat first or I bonk badly) are 3 hours or so.