~ practice card memorization by using an uncomfortably fast metronome

Ericsson suggested I try the same thing with cards. He told me to find a metronome and to try to memorize a card every time it clicked. Once I figured out my limits, he instructed me to set the metronome 10 to 20 percent faster than that and keep trying at the quicker pace until I stopped making mistakes.

❐ Moonwalking with Einstein about ◊ card memorization