It’s the little things, in aggregate, that can make the difference between something being exquisite and delightful, or else being full of friction.

When done well, the little things add up to make an overall positive impression. And, on the flip side, when ignored or done poorly, the little things add up to leave a negative impression.

This is why “good enough” can be the enemy, and why implementing many features poorly is actually a worse plan than implementing a few features very well. Though the princess slept on many mattresses, just one pea under the whole stack ruined her night’s sleep.

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A few years ago I was replacing all the flat slab doors in our home with new 6-panel slab doors. A slab door is just the door itself — I wasn’t replacing the jambs and frames, which means for each door I hung I had to cut out the grooves for the hinges. These are called mortises, and I used a router to cut them out.

Over several weekends I worked my way through the house, doing one door at a time. And as I did, I became acutely aware of all the shortcuts the previous owner had taken when they were framing and painting the doors I was now replacing. All the doorknobs had paint around their base, the door hinges were painted over, and so were the strike plates.

After I had hung about half the doors, I began to understand why there was so much sloppy work I was replacing. When you’re in the middle of a project like this it’s easy to get overwhelmed by all the little to-do items, and thus begin cutting corners in order to speed up the completion of the project.

As I was routing out each mortise and measuring the spot for each new strike plate, I felt the temptation to sidestep a detail here or there. I’d have to remind myself that I couldn’t take a shortcut — not even once. What would seem like a negligible issue in the moment would soon snowball into another sidestepped detail and then another, until there was an overall feeling of sloppy work.

When you’re in the middle of the project, you think, “well, a one-off here and a one- off there is not the end of the world.” But shortcuts add up, and those little details — for the good or for the bad — come together in aggregate and make the difference between something that is either exquisite, ordinary, or poor.

When I was done with my project, the difference was significant. Just as the sloppy work on the previous doors and knobs and hinges had added up to exude an overall “cheap” feeling, having new door knobs that weren’t tainted with paint slops, new door hinges that were clean and not painted over, and having doors that were free from scuff marks, all added up to an overall “classy” feeling that was greater than the sum of the parts.

And so, when you’ve committed to not take shortcuts, you quickly learn that sweating the details is where most of the hard work lies. Like I’ve mentioned before, it’s that 80/20 rule: 80-percent of the project gets completed with the first 20-percent of effort, and then it takes the remaining 80-percent of the effort to complete the final 20-percent of the project.

But it’s worth it because in these details lies the overall feeling of the product. The underlying “truth” of our product is found not in the feature set but in the details we implemented well. The details make the design.

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This article was from my book, Delight is in the Details.

I wanted to share it with you because it serves as one side of the coin.

When it comes to our goals, our projects, and/or our businesses, it is important to sweat the details.

However, there is another side to the coin: perfectionism will kill your project. We’ll get into that next.