Knowing your problems such as stress and a lack of mental clarity are proven to be improved with quality sleep is a) comforting b) intriguing c) motivating
Realising your can sleep less but feel more refreshed. What makes you feel energised and mentally alert is how deep you’ve slept - not how many hours - as proven by this clinical research. So even if you only have 4-5 hours to sleep, if it’s quality, you can feel more rested than if you have had longer, low quality sleep.
Memory loss and Alzheimer's also a consequence of insufficient sleep: due to a build up of neurotoxin beta-amyloid which is otherwise cleared during deep sleep. Researchers have found these plaques to be a sign of Alzheimer's.