I was eating wheat thins and Oreos on the trail, broth and ramen noodles in aid stations. I was not a fast finisher, came in 31st in 30.5hr.

The biggest small thing is skin care. On a short race you can manage a little chaffing or a hot spot, for longer races taking the 3min to Vaseline or clean whatever is rubbing before it turns bloody is worth it

I actually didn't sleep too well because my legs aches and I had an early flight home, maybe 7hr, don't remember any dreams.