Check out this video from Tony Robbins on cultivating psychological strength.
Five Steps Towards Self Improvement:
1) Take Control of your Mind. Feed and Strengthen the Mind.
2) Feed and Strengthen the Body. Create Momentum.
3) Find a role model to inspire you and show you the way.
4) Take Massive Action.
5) Feed and Strengthen your Spirit. Reflect on the Gratitude you have and the Gifts you can Give.