Know that everything has value. 

Know that value is subjective--you have heard it said that someone's trash is someone else's treasure.

Know that people have value, and people who are valuable to me may not be valuable to you. Vice-versa.

You must learn that everyone will not have equal value, and everyone will not have only one value. I am valuable to some and I am worthless to others.

You must learn that some people aren't worth the hurt and the pain, and some will always be worth it...no matter what.