For breakfast, I always have eggs - whole eggs. I think the fats are really important. I also like turkey bacon and really hearty whole-grain bread. I'm very picky about it. You need bread that's high in fiber and low in carbs. It's hard to find, but it's worth it.
The biggest thing as I have gotten older is the calmness that's come over me.
My advice is: if you've got to be miserable to write great music, then drive a truck.