A long time ago, someone told me about the negative thinking method. There is a saying that in every position there is a move that will not worsen it. The method goes as follows.
You chose n candidate moves which are possible in the position. You try to find out some good moves. If you reject n-1 move because they are worsening the position you can immediately play the n-th candidate move.
It has its, flaws but it could be useful sometimes. I tried to find out more about this technique, but I did not have luck. Has anyone here heard about that or something similar?