How to be Smarter: An easy way to get ahead in school is to search for articles that are relevant to the course and then email them to the teacher, with a note saying you found this article and it relates to class. Teachers like the extra effort and you look like you are an avid newsreader, which is a good thing to be.
How to be Prettier: Layer a cotton tee shirt under bulkier sweaters. The cotton tee shirt will absorb sweat, and also smooth out your shape.
How to be (less) Awkward: When you go to a show/concert/bar, and they put an X or a stamp on your hand, ask for it to go on the underside of your wrist. This makes it less unsightly in pictures and easier to wash off the next day for work.