Some things you can do might include reading some self-help books that resonate with you, hang out more with friends/family and people who love and appreciate you for you. Get busy pursuing your goals, working out at the gym, and doing the things you love to do.
Lastly it is important to always have something to look forward to.
If you are trying to get over a bad relationship experience you may want read a book about healing and making better choices in the future. My book deals with such issues "My Cat Won't Bark! (A Relationship Epiphany)" http://www.amazon.com/gp/product/1468104721/?tag=h...
However there are lots of others out there as well. Best of Luck!