Most neuroscientists agree that sleep is when we organize memories for long-term storage. People whose sleep is disturbed after studying have far more imperfect recall than people who get a good eight hours of shuteye. But a study published a couple of weeks ago shows that you can use simple memory reinforcement techniques while you’re sleeping that will make your recall better than average. … What our brains do while we sleep has a lot to do with how well we remember what we’ve done while we’re awake.