Jeff Olson (Businessman/Solar CEO) wrote a great book called 'The Slight Edge' about his life philosophy and there's an interesting quote from it:
"A friend of mine says that people make two lists about their spouses and carry these lists around in their heads. The long list is a detailed accounting of what’s wrong with their spouse, and the short list is a summary of what’s right. The long list they consult every day. And the short list? That’s the one they read at the funeral.
People on the success curve don’t wait for the eulogy. They rip the long list to shreds, scatter its pieces to the wind, and spend every day reading from the short list. They make themselves experts in “what’s right,” and let go of “what’s wrong.” They never hold a grudge—not because it’s morally wrong (although they may agree with that reason, too), but because it simply gets in the way of the curve their life is taking. It slows them down. They’re too busy moving toward the future to be gazing into the rearview mirror."