List your favorite subjects in school and what you're especially good at. For example, your character could be good in math, which helps her figure out a puzzle. Or your character could be a great soccer player, which makes him good at running away from bad guys.List the things you're not so good at and include them in your character's makeup. For example, if you're not good at science, maybe your character does chemistry experiments that are always going wrong. If you're not so good at paying attention in school, maybe your character misses something important.