I don't have any special motivational techniques, Iris Five!
But here's my list of why I'm trying to lose 27 pounds at the moment:
(1) I had previously lost more than 100 and gained a little back, so I want to go down again BELOW where I was to the goal I originally set (hope you can figure out that sentence);
(2) I wish to regain a previous fitness level because I felt better when more fit;
(3) I don't wish to buy larger size clothes ... I gave away all the large sizes and don't want them back.
(4) Life for me is more fun in a sensible-sized body ... it just feels better.
(5) I only have one life (that I know of) and I want to extract the maximum from it and be around as long as possible. When I was heavy, I had less chance for that to happen. I don't want to go there again!