Athletes will tell you they envision themselves crossing the line in first position. Lifters picture themselves completing the lift and racing drivers run the corners through their mind tirelessly. This, is to a degree, the same concept as positive affirmation, and it works.
After reading a blog post on a similar subject it occurred to me, this technique would work equally well in negative conditions. Picture the problem and picture yourself overcoming the problem. If it works in one orientation, it will work in the opposite too.