Mentally

One of the best quotes I ever heard was "If you think you can, you can. If you think you can't you're right." 

The power of positive thinking is awesome. 

If anyone tells you that you can't do something, prove them wrong! 

Despite the obstacles in your life, remember-you have the ability to do whatever it is that you put your mind to; don't let anyone bring you down. 

http://freezeframe34.hubpages.com/hub/Thoughts-on-Happiness

JF