There is a fine line between optimism and delusion. I cross it often.
To reach levels of success you've never reached before, you must be committed at a level you've never been committed at before.
Make today the BEST day of your life, because there is no good reason not to.
Believe in your potential, not your past.
Anything you want for your life, if someone else has done, become, or achieved it, use that as evidence that so can you.
You must establish and maintain the beliefs that you are... capable, committed and destined to achieve your goals.