Jordan B Peterson gave 12 Rules that helps him to stop feeling sorry for himself and help develop is potential in life. Here are few of the rules:
Stand up straight with your shoulders straight
Treat yourself like someone you are responsible for helping
Befriend people who want the best for you
Compare yourself to who you were yesterday, not the useless person you are today
Pursue what is meaningful, not what is expedient etc.
He explained the rules extensively in the book, this makes this book important for everybody that wants to live a fulfilled life