Honey, I'm Killing Myself

I'm watching the ever entertaining "Honey, We're Killing the Kids" and I had that revelation...again: I know what I have to do to be successful and lose weight and yet, I'm not doing it. Ridiculous. My best weight loss is when I'm doing a variety of fun exercises and eating mostly core foods. It's just so strange that I know and understand the ins and outs of nutrition...but I can't get my emotions/motivation/self-esteem to actually get it done! WHY?

Update:

I got off my sorry ass and made a core dinner of lemon-pepper tilapia with quinoa