Your greatest resource is your time.
You are not what you think you are, but what you THINK, you ARE.
Resolve in advance to persist until you succeed, no matter what the difficulty.
The very act of accepting responsibility short-circuits and cancels out any negative emotions you may be experiencing.
The only thing we know about the future is that it will be faster changing and more unpredictable than the present.
If you were offered the opportunity to be TOTALLY happy tomorrow, would you take it? If yes, (and I suspect most of us would say yes) what are you doing TODAY to make tomorrow be a happier day than today?