Well, I've been close enough lately to giving up. But, #1, I read the posts of people who have lost much more than I. And the posts of people who have many stressful things going on in their lives (as have I, of course). And the posts of those who are struggling to stay motivated.
#2, I remind myself that I'm feeling better since I'm eating better and a few pounds lighter.
#3, (and this may be heresy) I probably have the oreo. One oreo, not the bag. I do think we need some programmed in treats occasionally and I think the reason I often failed before was that I was trying to be too strict with me and would give it ALL up instead of saying "ok, have some (a little) of that birthday cake". I'd go nutso trying not to have any and eventually cleaning out the whole cake.
As a matter of fact, I weighed in this morning. I have been dying to have a mocha muffin for days now and there are four in the fr eezer. All week, I have told myself I can have that muffin on Thursday and I will. then I'll hop back on the goodgirl train and keep chugging. So pick a day, pick a (small) treat and then keep on chugging.