A person with a strong metamemory is able to take full advantage of whatever memory capacities he or she has. Someone with a weak metamemory, on the other hand, is like a person who has lost the instructions for operating a computer. No matter how much memory capacity is available in the computer, without good instructions the capacity may never be used
—  Dan Wegner in Transactive Memory: A Contemporary Analysis of the Group Mind

// also be careful of your “lies”, ie misinformation on study material. You might remember something wrong as you’re testing yourself if you don’t double check with original material. And then the memory gets reconsolidated into something wrong