Okay, here's my list...Nature Valley Bars (all kinds of assortments and they are terrific as are Odwalla bars- fantastic and a huge variety also), Granola Thins - also from Nature Valley, graham crackers (they even have them now with peanut butter and chocolate) trail mix (I make my own) any fresh fruit, (watermelon, plums, pears, oranges, apples, pineapple, grapes, bananas, even fruit cups and there is a great one with apples and granola on top from Doyle, etc) all kinds of berries, any flavors of yogurt, hummus, tuna salad, chicken salad, sliced up veggies with dips or salad dressings, shredded coconut, peanut butter, cucumber salad, egg salad, assortments of pita chips or crackers, biscottis, fruit salad, cottage cheese with or with fruit in it (I like pineapple in mine), all kinds of nuts, raisins, cups of soup and cups of noodles, various cheeses, Oscar Meyer carving board turkey breast and carving board chicken breast lunch meats, honey nut granola - which I can put in the yogurt or the cottage cheese and also a baggies of wheat germ for the same thing, whole grain bagels, healthy cookies, hard boiled eggs, dried plums, raisins, any dried fruit really, bag of popped kettle corn, restaurant style tortilla strips, guacamole, tortillas - you can put some meat and veggies in them, triscuits, and bags of a good dry cereal that you can munch on, healthy sammies.
Be creative, experiment and have a large variety of things you enjoy so you won't be bored and always bringing the same old food with you. Oh and a stainless steel thermos with a built in cup for hot soups. There are small bottles now of apple juice, watermelon juice, V-8 veggie juices and the new V-8 fruit juices too.