Whatever you focus on expands, as it has been said many times. "Whatever you focus on, whether positive or negative, is what you get," I explain, "so focus on the positive and you'll attract more positive into your life."
I'm not claiming that I'm constantly in a good mood or that simply thinking positive thoughts will get you where you want to go. Negative ideas creep up on me, too, but I don't let them last as long as they used to. Look out, world, when I'm focused. I believe we can do practically anything if we FOCUS.