If you get hungry mid-day, a banana is the best snack at your desk, after a workout, or in between classes. Fruit is a very good snack in general.
While you can find zucchini in markets in most places year-round, allowing you to make everything from breakfast dishes like zucchini and onion frittatas to snacks like zucchini-stuffed crab cakes, the onset of fall marks the beginning of hard squash season.