But in his book If Only, the psychologist Neal Roese argues that when it comes to real-life choices, ‘if you decide to do something and it turns out badly, it probably won’t still be haunting you a decade down the road. You’ll reframe the failure, explain it away, move on, and forget it. Not so with failures to act’. You’ll regret them for longer, too, because they’re ‘imaginatively boundless?’ you can lose yourself for ever in the infinite possibilities of what might have been. In other words: you know that thing you’ve been wondering about doing? Do it.