“How? Try to travel into the future and look back. In 2023, do you think you’re more likely to say, “Back in 2018, I wish I’d been more aggressive” or “Back in 2018, I wish I’d been more defensive”? And is there anything today about which you’d be likely to say, “In 2018, I missed the chance of a lifetime to buy xyz”? What you think you might say a few years down the road can help you figure out what you should do today.”