I think we need to think about our physical activity as a reward, as something enjoyable and something we look forward to doing, not something that we regard as self-flogging.

So learning to play a new instrument, learning a new language - those sorts of things will pay dividends for years or decades to come.

So setting up automatic savings plans, and buying insurance as opposed to buying a new thing. The newness effect of a new thing wears off in nine months to a year, but financial security can last a lifetime.

The beauty of moving naturally, i.e. walking and gardening, is they're low impact. You're less likely to fall down and break a hip. Setting up your life so you're nudged into general physical activity every day is a strategy for your entire life from age 10 to 100.

The brutal reality about aging is that it has only an accelerator pedal. We have yet to discover whether a brake exists for people.

Inconvenience yourself: ditch the remote, the garage door opener, the leaf-blower; buy a bike, broom, rake, and snow shovel.

Actually, when you get into your sixties and above, you want to think about exercise differently. It's not just about you know cardiovascular or lifting weights. It's also about avoiding accidents.