The Finishing Mindset Starts Before You Hit Record
Finishing songs isn't something that happens at the end of your process. It's a mindset that shapes every decision you make from the first note. If you approach every session with the intention of completing a track, you'll make different choices than if you're just exploring or jamming.
This doesn't mean you should never experiment. Exploration is essential for finding new sounds and ideas. But there's a difference between exploratory sessions and production sessions. When you're in production mode, every action should serve the goal of moving the track toward completion. That means making decisions quickly, committing to sounds, and avoiding the temptation to endlessly tweak.
Commitment is the hardest skill to develop in music production. It's scary to commit to a sound or an arrangement because it feels final. What if there's a better option you haven't tried yet? But the truth is, you can always change your mind later. The difference is that if you commit, you have something to change. If you never commit, you have nothing.
Try this: the next time you start a track, decide before you open your DAW that you're going to finish a rough version in that session. It doesn't have to be perfect. It doesn't even have to be good. It just has to be complete. The act of finishing, even badly, teaches you more about workflow than ten perfectly polished loops ever will.