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To refresh your own memory, hit save
The Boston Globe: WHEN YOU SAVE a document on your computer, do you find yourself breathing a sigh of relief? In several experiments, researchers asked students to memorize a list of words in one computer file and then memorize a second list of words in another computer file. Those students who were allowed to save the first file for later restudying—as opposed to simply closing it—subsequently did a better job of memorizing the second list of words. In other words, being able to save data made it easier to learn new data. This effect was nullified if participants expected the computer to lose the saved data, or if the list of data was very short (and thus easy to memorize either way).