If you are contemplating a new year’s health kick, you could be forgiven for feeling a little overwhelmed. Do yoga, run, lift weights, cut the carbs, or the fat (depending on the particular diet that’s in vogue), ditch the booze, reduce your stress.

It is easy to feel like your life needs to be overhauled in order to be a healthy, happy human being.

But what if you were to make only one change?

We asked experts what single thing they would recommend people should on the improve their health, assuming they are an adult who is your stress and not a smoker.