Well, I've said it many times in other blogs, but I ask myself (quite a few times) throughout the day,
"What do you REALLY want?"* I of course have an answer, which is healthy, thin, attractive,...etc.

The point is that forcing myself to both ask and then answer the question really focuses my mind on, well, what I REALLY want.

I find this very motivating (maybe not exactly 'feel good') but this is a great way to put my long terms goals ahead of the short term pitfalls that we all fall into occassionally.