Religions I might try before becoming a full Atheist...

[Angrboda]

Buy a guitar or something, go to the gym, study science. Religion is a waste of time.
Other wise words, dont get addicted to drugs, dont just settle for a minger when you lose your virginity, STAY IN SCHOOL
as long as its a worth while topic studying

Actually, as a thirteen year old, you probably won't like to hear this, but if you're looking to improve your life in meaningful ways, develop a habit of healthy exercise, and develop regular sleep habits ("early to bed, early to rise..."). Exercise does wonders for both your mental and physical health, and inadequate or unsatisfying sleep is one of the greatest contributors to stress and unhappiness (and poor performance; look it up).

A sound mind and body are the most effective tools for finding truth and happiness.