Saw the post about producers leaving their beats on 80% finished. This plagued me for years. The one thing that fixed it was deciding that when you sit down to make a beat you should aim to have a first draft completed before you get back up again. Fully arranged, mixed nicely, basic mastering to sit at 14 lufs. Transitions between sections. A fully finished beat that you'd be happy to send out. Then when you come back to it the next day, you aren't coming back to finish it, just to adjust.