Mixing sweet with salty is a tried and true way to satisfy the munchies. Measure cup of apple slices and spread a thin layer of unsalted peanut butter on each slice. To stay near the mark, don't use more than 2 teaspoons of peanut butter in all.
Make Your Own 100 Calorie Snacks! This site shows tons of snacks with 100 calories in them, all you have to do it contain them in something, and you can take it to go! tons of ideas on other meal/food things as well