If you have access to a fridge, I get the hummus singles and veggies, and the little babybel cheese, also there are these 3packs of nuts and cheese in the cheese section at the store
Roasted seaweed. popcorn (not the bagged ones; they have all sorts of additives, salt, grease...) all you need is kernels, a paper bag, and a microwave.
Tuna, hmmm... not too much into fish, but I like it now and then.