1,000 Things I Learned From Jumper
1 - If you're kinda dumpy looking, but want to make that leap from small town screen extra to Lead Actress, get inserted into the main coverage angle of a bar scene, and constantly look at the camera.
2 - If you're a 13 year old actor playing the "younger" version of a 20 year old actor, don't worry, they'll fix it using digital effects.