I really like the dried fruits/nuts type mixes, just ran out and bought a container for the way home. Find they really help in holding me over till the next meal.

A couple local stores make their own mix that's pretty good, but on the road I've found the frito-lay fruit and nut mix to be really good when you don't have a clue about the brands in the store. Planters also has a line of them now too.

My wife on the other hand loves the granola type bars (not the energy bars though).

For the hotel, there's usually a couple microwave bags of popcorn in the carry on.