He drinks coffee just before he nods off for a twenty-minute nap. When he wakes up, many of his newly formed memories will have been consolidated into long-term, stable storage; his maxed-out hippocampus will have been somewhat cleared out, making room for whatever he needs to remember next; and the caffeine from his coffee, which takes about twenty-five minutes to enter his bloodstream, will almost have kicked in, activating his frontal cortex neurons to pay attention.
