I've made alot of mistakes in my life so take my advice:

never ever....never let a day go by without telling someone how much you care.
honesty....always be honest with everyone in your life even if it's bad.
Give out hugs....hug everyone you love & never let them go.
don't let anyone run your life..it's your life & you should live it(legally).
be strong....don't let people run you down & tell you you're worthless cuz you're not.
fall in love....fall in love with someone who treats you right.who don't hurt you but with love.
heart....believe in yourself with your whole heart.believe in God & in faith.
and finally let go....let go of all the pain & let it out if all else fails.