just realized i didn't answer your motivation question...
i just try to remind myself how good it feels that the pants are just a tad bit looser! i haven't had any serious success yet (only started a month ago), but i try to take all the little victories and make a big deal out of them. any time i conquer a new work out or clothes fit a bit better, i do a little celebration dance on the inside! reminding myself how proud i am of myself and how hard i am working helps me stay away from bad things and gives me the desire to keep going.
i can't wait until i have amazing before and after pictures like so many of the people here do!!