It's usually cookies or something equally easy to grab. At school, it'd be cookies, granola bars, crackers... absolutely anything since all my snacks were in my dorm room. XD; Those were usually my meals aside from dinner, too.
Now that I'm home, I'm at the mercy of my parents. We haven't had cookies in a while since they haven't picked them up at the grocery store so... when I wander into the kitchen for a boredom snack, I usually wander back empty-handed or with a piece of bread or something. *lame*