Protect your memory: Don't skimp on sleep.
Saying ‘let me sleep on it’ is good for your memory.
Studies about sleep consistently show that research subjects do worse on memory tasks when they are sleep deprived.
Sleep helps us consolidate new information so we can recall it later. Transferring memories from short term to long term (or in brainspeak, from the hippocampus to the neocortex) occurs because of brain changes that happen during sleep.
Other studies show a link between poor sleep and the buildup of beta-amyloid plaques in the brain, which are associated with Alzheimer’s disease, although doctors are not sure if the plaques are a cause or effect.
So get your eight hours or more, if you can. Your future brain will thank you.