tons of great ideas already.
I don't know, buying myself stuff as a reward never seemed to help me much weight loss wise in the sense of a motivation. seeing smaller sizes fit, that is pretty dang cool, and I can try on clothes for free!
I think making sure I don't feel deprived in the sense of enjoying my life helps me, but that doesn't mean I have to fork out large amounts of cash. Reading (libraries have DVDs, CDs too), walking, sight seeing or going to places I haven't been in a while that I enjoy.
mindset can go a long way.