Finish it to the last step

It isn't. The last step is where the work turns into craft, and it's the only part that happens purely because you decided it would.

There's a stretch in every task where the novelty is gone and the finish is still out of sight. That's where men go find something else to do. Another tab, another errand, a sudden urgent need to reorganize a shelf. The interest dying is not a signal to stop. It's just the middle. Boredom is the toll road to finished work. Pay it and keep driving. You'll notice the last twenty minutes of a job are almost always the easiest and the most skipped.

Vague work never ends, so it gets dropped instead. Write the last step down before your hands move. Not "clean the garage." The floor swept, the tools on the wall, the trash at the curb. Now you can tell when you're done, and you can't lie to yourself about it halfway through. A man who knows the finish line stops negotiating with himself at mile three.

Sand the part that faces the wall. Check the math twice on the page nobody will read. Wipe the tool before you hang it. Not because someone will find out, but because you're the one building the habit, and the habit doesn't know the difference between the visible seam and the hidden one. Do it sloppy where it's hidden and your hands will start doing it sloppy everywhere.

Take the one ungraded task you left at ninety percent and do the last step tonight.

Work that only you can see puts a question in front of you: who exactly is this for? If the answer is the room, you'll quit the second the room empties. Whatever you do, work at it with all your heart, as working for the Lord, not for human masters sits in Colossians 3:23. Hear what that does. It moves the audience. Someone already saw the hidden seam, already knows the corner you cut or didn't, and already accepted you before the job was graded. You're not finishing to earn a verdict. The verdict came first. That's why you can sand the back of the board without anybody clapping. The approval isn't on the table anymore, so the craft is free to be craft.