I'm with the clothes. Vanity is a big motivator for me.
I have this pair off jeans I got over a year ago. They're from Lucky, so they weren't cheap. They were tight when I bought them, but of course I said "oh, I'll just lose 5lbs and they'll fit." Riiiiiiiight.
So, +15lbs later....
I have them hanging on a rack in my room where I see them all the time. And I can now squeeze me (not as) fat a$$ into them and button them!!! They aren't comfortable yet, but I'm getting there.
Someone on another thread posted a great montage someone made on youTube of before and after pics... I should go find it...