One of the occasions where my thinking patterns really got challenged in this area was when I quit smoking. I had to really realize and re-train myself that it wasn't a case of choosing the negative ... not a case of "oh, now I won't smoke" but a case of "oh, now i'll [whatever it was]". It's strange how that sort of thinking creeps in with something like that. I mean, it's not as if when picking a coffee cup or something in the morning I think "oh, I will not pick that blue one". You don't think that way. You think in terms of the one you *do* choose. Interesting thing to have to work around mentally.