By controlling your mind, the thoughts you give precedence to, you actually change your state, and your results.  So how do you do this?

Change the environment around you.
Change people that you hang out with.
Quit drinking.
Quit smoking.
Quit drugging.
Dress up.
Wash your car, clean your house and get organized.
Be extra nice to the next ten strangers you meet.
Unplug your TV for a month.  (Repeat as necessary.)
Start every day by reading one page of “As a Man Thinketh.”
End every day by reading one page of “As a Man Thinketh.”
Go volunteer for a day at a homeless shelter, or pediatric hospital.

That’s a few off the top of my head.  What do you think?