No matter your age, getting good sleep is crucial.

While you sleep, your brain transfers short-term memories to long-term storage,
Clears the short-term memory to be used the next day,
Brings up long-term memories while you dream, allowing your memories to evolve,
Cleanses harmful substances accumulated in the brain, helping prevent Alzheimer's,
And generates a large number of immune cells, strengthening your immune system.

Memories are not just for the past, but for the future.

The brain is a future prediction machine, and it uses tools like Markov blankets, Bayesian inference, and the Free Energy Principle in its mathematical models - tools that current AI systems are using a lot.