1. Play something
2. Play it again but don't play (be silent) what you're not completely sure that you remember
3. Play it again but only play when (in a perceived timeline of what you played before) you're not sure that you remember
4. Accept that memory is subjective and corrupt. Choose x very specific criteria and be very strict about remembering those (as if they were a written score) but feel free to change everything else. The criteria and number of criteria can be changed to try out different things and see if they have different outcome