Realize it’s possible, instead of telling yourself why you can’t.
Become aware of your self-talk.
Squash negative thoughts like a bug.
Replace them with positive thoughts.
Love what you have already.
Be grateful for your life, your gifts, and other people.
Focus on what you have, not on what you haven’t.
Don’t compare yourself to others.
But be inspired by them.
Accept criticism with grace.
But ignore the naysayers.
See bad things as a blessing in disguise.
See failure as a stepping stone to success.
Surround yourself by those who are positive.
Complain less, smile more.
Image that you’re already positive.
Then become that person in your next act.
From Zen Habits blog