Every moment you get is a gift. Spend it on things that matter. Dont spend it by dwelling on unhappy things.
Your time is limited, so dont waste it living someone elses life. Dont be trapped by dogma which is living with the results of other peoples thinking. Dont let the noise of others opinions drown out your own inner voice. And most importantly, have the courage to follow your heart and intuition. They somehow already know what you truly want to become. Everything else is secondary.