Nobody has any experience of being any older than they currently are, but a lifetime's memory of being younger. Hence most people of all ages feel old.

One trick I like to play on myself is to imagine I come back from twenty years in the future. What advice would I give myself? First thing would have to be "shut up about being old! Your life is still ahead of you."

I like the other trick too, where I imagine being visited by a teenage me and thinking what he would say about where I'm at. It can be an awkward conversation. Where's the Ferrari?

As a less whacky version, pay really good attention to your parents and your kids.