First thought that jumps up is "another day, another dollar." That leads to wondering where I picked acquired that saying, sounds like something my parents might have said, because it's not particularly uplifting nor positive. Neither were my parents. Grew up in the Depression years, knew poverty close up, and never recovered from that experience.
Another day, another chance for new beginnings and opportunities feels a whole lot better to me. Not that I'm all that sunny natured. I was, after all, raised by my parents and their somewhat dour nature rubbed off on me. But, in this age of positive thinking, I've attempted to cultivate a better attitude. One day it works. Another day, it doesn't.