Can you tell me the typical healthy choices i can make as a teen?

Study: Everybody will tell you to avoid drugs, alcohol & tobacco & getting fat. The time you spend studying now will pay off tremendously -- find areas you like and are good at and prepare for a career in a world that's now extremely competitive. Generally, learn time-management. Do athletics only if you truly enjoy your sport -- there's little long-term return beyond the benefits of moderate exercise.