Ernest Hemingway woke each morning and began writing straight away.

He described his daily routine by saying, “When I am working on a book or a story I write every morning as soon after first light as possible. There is no one to disturb you and it is cool or cold and you come to your work and warm as you write.”

Hemingway’s routine — along with hundreds of other prolific authors, artists, and scientists mentioned in Mason Currey’s book, Daily Rituals: How Artists Work — hints at the most productive strategy I have found for getting things done and making daily progress in the areas that are important to you.

Let’s talk about the only productivity strategy you’ll ever need, why it works, and what holds us back from using it consistently.

Related: The Surprising Strategy One Man Used to Eliminate Procrastination

Productivity, Simplified

No need to draw this out. This productivity strategy is straightforward: Do the most important thing first each day.

Sounds simple. No one does it.

Just like Hemingway, who produced an remarkable volume of high-caliber work during his career, you can make surprising progress each day if you simply do the most important thing first.

Why It Works

We often assume that productivity means getting more things done each day. Wrong. Productivity is getting important things done consistently. And no matter what you are working on, there are only a few things that are truly important.

Being productive is about maintaing a steady, average speed on a few things, not maximum speed on everything.

That’s why this strategy is effective. If you do the most important thing first each day, then you’ll always get something important done. I don’t know about you, but this is a big deal for me. There are many days when I waste hours crossing off the 4th, 5th, or 6th most important tasks on my to-do list and never get around to doing the most important thing.

As you’ll see below, there is no reason you have to apply this strategy in the morning, but I think starting your day with the most important task does offer some additional benefits over other times.

First, willpower tends to be higher earlier in the day. That means you’ll be able to provide your best energy and effort to your most important task.

Second, in my experience, the deeper I get into the day, the more likely it is that unexpected tasks will creep into my schedule and the less likely it is that I’ll spend my time as I had planned. Doing the most important thing first each day helps avoid that.

Finally, the human mind seems to dislike unfinished projects. They create an unresolved tension and internal stress. When we start something, we want to finish it. You are more likely to finish a task after starting it, so start the important tasks as soon as possible. (Just another reason why getting started is more important than succeeding.)

Related: How to Find Your Hidden Creative Genius

Why We Don’t Do It

Most people spend most of their time responding to someone else’s agenda than their own.

I think this is partially a result of how we are raised by society. In school, we are given assignments and told when to take our tests. At work, we are assigned due dates and given expectations from our superiors. At home, we have tasks or chores to perform to care for our kids and our partners. After a few decades of this, it can become very easy to spend your day reacting to the stimuli that surround you. We learn to take action as a reaction to the expectations, orders, or needs of someone else.

So naturally, when it comes time to start our day, it doesn’t seem strange to open our email inbox, check our phone, and look for our latest marching orders.

I think this is a mistake. The tasks assigned to us by others might seem urgent, but what is urgent is seldom important. The important tasks in our lives are the ones that move our hopes, our dreams, our creations, and our businesses forward.

Does that mean that we should ignore our responsibilities as parents or employees or citizens? Of course not. But we all need a time and space in our days to respond to our own agenda, not someone else’s.

Not a Morning Person?

Does the word morning make you mourn? Does the morning sun remind you of the The Eye of Sauron? Can you think of nothing worse than rays of golden sunshine streaming softly onto your pillow?

No worries, night owls.

As I scanned the daily habits of hundreds of authors, artists, and musicians in Daily Rituals, I noticed an important trend: There was no trend.

Related: How to Change Your Beliefs and Stick to Your Goals for Good

There is no one way to be successful. There are just as many night owls producing fabulous work as there are early birds. But no matter what their particular routine looked like, every productive artist embraced the idea of protecting a sacred time each day when they could work on their own agenda.

I find morning to work best. Your mileage may vary.

The phrase “Do the most important thing first each day” is just a simple way of saying, “Give yourself a time and space to work on what is important to you each day.”

A version of this article first appeared on JamesClear.com. For useful ideas on improving your mental and physical performance, join his free weekly newsletter.