Suggest you use the memory supercharger with a goal of remembering your strategy for problem solving.
Remember too that not all problems can be solved with the same strategy so if your problem solving requirements have gone up a level (e.g. next grade in school) Then you will need to perhaps modify your strategy somewhat. Use the Personal Genius paraliminal for that.
Remember also not to stress yourself about it. As your anxiety goes up it effectively blocks that which you desire to achieve. So relax and play with it.
Alex