Active Mind

It is said that an active mind makes a man live longer. And mind has a major to play with our health.
An active mind stimulates the body. It is just the reverse case with inert brains.
So the question is how to keep the brain active? Observe, read and think!
If possible write down.
Take a keen interest in people around you. Socialise and try to some community work.
Do not sit idle and brood over the past. You are not going to get anything out of it.