If life is short, we should expect its shortness to take us by surprise. And that is just what tends to happen. You take things for granted, and then they’re gone. You think you can always write that book, or climb that mountain, or whatever, and then you realize the window has closed. The saddest windows close when other people die. Their lives are short too. After my mother died, I wished I’d spent more time with her. I lived as if she’d always be there. And in her typical quiet way she encouraged that illusion. But an illusion it was. I think a lot of people make the same mistake I did.

The usual way to avoid being taken by surprise by something is to be consciously aware of it. Back when life was more precarious, people used to be aware of death to a degree that would now seem a bit morbid. I’m not sure why, but it doesn’t seem the right answer to be constantly reminding oneself of the grim reaper hovering at everyone’s shoulder. Perhaps a better solution is to look at the problem from the other end. Cultivate a habit of impatience about the things you most want to do. Don’t wait before climbing that mountain or writing that book or visiting your mother. You don’t need to be constantly reminding yourself why you shouldn’t wait. Just don’t wait.

I can think of two more things one does when one doesn’t have much of something: try to get more of it, and savor what one has. Both make sense here.

How you live affects how long you live. Most people could do better. Me among them.

But you can probably get even more effect by paying closer attention to the time you have. It’s easy to let the days rush by. The “flow” that imaginative people love so much has a darker cousin that prevents you from pausing to savor life amid the daily slurry of errands and alarms. One of the most striking things I’ve read was not in a book, but the title of one: James Salter’s Burning the Days.

It is possible to slow time somewhat. I’ve gotten better at it. Kids help. When you have small children, there are a lot of moments so perfect that you can’t help noticing.

It does help too to feel that you’ve squeezed everything out of some experience. The reason I’m sad about my mother is not just that I miss her but that I think of all the things we could have done that we didn’t. My oldest son will be 7 soon. And while I miss the 3 year old version of him, I at least don’t have any regrets over what might have been. We had the best time a daddy and a 3 year old ever had.

Relentlessly prune bullshit, don’t wait to do things that matter, and savor the time you have. That’s what you do when life is short.