few things i have learned. one would be people make mistakes no one is perfect you learn from your mistakes. like they say you live you learn and its very true i believe that to this day. 

another thing would be treat others how you want to be treated. give to receive and that is true nothing wrong with being kind.

never let ur mistakes make you who you are its what you learn from them and what you can teach others that makes you who you are.

and again of course what doesnt kill you makes you stronger. meaning everything you deal with will only make you stronger in the end to handle anything

and always remember everything happens for a reason even if its bad or a loss of sumone you love its always for a reason God never throws anything in your life you cant handle or overcome espcially when you have good family and friends and defentally when you believe and have faith never give up