I used to sabotage myself all the time.. as a personal trainer I feel a HUGE pressure to be super-lean and fit. While at 68kg I'm not big, and people keep telling me I don't need to lose any more weight, I still feel massively pressured by the industry to be smaller.
I'll bake a cake or a batch of muffins just because I feel like cooking, and then they are sitting there staring me in the eye!! I used to go into the kitchen dozens of times a day and pick little bits off the cake/muffin and pretend it didn't count. I hate to say it but Weight Watchers taught me that in a way. Because certain things eg vegetables, diet jam, diet jelly, diet cordial etc are "zero points", I'd trick myself into thinking that just a little nibble of something wouldn't amount to as many kilojoules as it would take to be half a point, even though I'd be constantly having a nibble!!
I've since been working on this and have pretty much got the problem nipped in the bud. Although when I'm feeling stressed, anxious or panicky, I find it sooo hard to just not go around having little nibbles of everything!!!