The best motivation for fat loss:
You're going to be here 5 years from now. And the next 5 years will be suffering. Noone can change that.
Now, here is the question. You know, that your next 5 years will be suffering. But, if you suffer doing nothing, you will be suffering the 5 years after that too. Or, you can suffer just a slightly more for the next 5 years, and then have it finally solved.
When worded like this, it does put a different perspective on the suffering of today.