I'm a big believer in positive self-talk. Shoot, I believe positive thinking in general. My grandfather is big into "Positive Thinking" and though we make fun him, because truly the man is obsessed, he has the right idea. I grew up with lectures and a set of tapes called "Make Your Own World" with a little character names "Spokes" and his "Magic Mirror".
I attribute my life's successes entirely to positive thinking. And I think that once my own self-talk about my weight loss turned to positive statements, my whole outlook changed and I was able to move forward. It was from this that I was able to find the joy in every day activities and it was from this that I was happy with myself well before goal.