I cycle. Play golf. Do some resistance exercise most days. That's the body taken care of.

I enrol on a few MOOCs every year (look for Coursera or FutureLearn) to keep learning. Read all the stuff I didn't get round to while I was working. That's the mind ticking over.

Did I mention cycling? I go on at least one serious bicycle tour every year. This year it's France, so I'm spending a bit of time restoring my French in preparation.