My go to has always been half of a peanut butter sandwich and a small cup of coffee about two hours before race time. A banana works well too. The race series I do are about a 40 minute drive away. That gives the coffee time to activate my bowels (if you know what I mean). I can’t run on an empty stomach. It makes me jittery, dizzy, and my feet and hands start to tingle and go numb if I haven’t eaten.
As far as socks, I swear by Feetures. They’ve been my go to for a very long time.