Every day I read my mission statement. Among other things it reminds me that "I repeatedly reject diminishing expectations and diminishing commitments, and that I will frequently refresh my positive expectations and commitments."
Then I read a list of my current projects noting progress, what my next step is, and why this is important. I don't always do this well, but this is what I strive to do.
I also think that you have unrealistic expectations. You seem to be trying too much. I know I have that problem. It hurts like ** to give up on things I would like to do, but I can't do them all.