Motivation and Willpower

Every time I slack off from exercising or eating the way I should I blame it on a lack of motivation and I search to find that motivation that got me to wanting to get healthier. Sometimes I find it and other times I don't. I often sit and wonder what keeps a person motivated to continue to work out and eat right. What gives them that drive and heart not to give up even though temptations surround them. I thought I had found that motivation, but it seems to come and go.

Maybe it's not just about being motivated, but having the willingness to stick through regardless of what is put in front of me. Just because there's cake and donuts at a party doesn't mean that I have to eat them. Although I am motivated not to eat them, my willpower just goes right out the window and I break down sometimes. So, how do I keep my willpower strong and not give in. In the past, it's been something that has clicked in my head, so maybe having willpower is something that clicks in your head and you just get it. Whatever it is, I think it needs to click in my head again.