If you have any questions please let me know so it can be added here.
I eat but try not to stop. Nutrition planning is a fairly important part of the plan. Part of long running is managing a calorie deficit.
As little as possible. During a 100 mile or a 24 hour event I would plan not to sleep.
It depends on the terrain. Roads that are mostly flat can take 20 hours but technical trails or hills it takes me up to 24 hours.
Possibly. There is fat in the brain and once you burn that off you can run much farther; although I can't say it has improved my I.Q. 🙂
To some, a lot actually. There is a fundamental reward when putting together the pieces and getting the content to display just right. A UX interaction that is fundamentally mundane has an inherit challenge in it to develop something delightful.