I've gotten tremendous gains out of breaking actions that are easy to fail into multiple steps so I know exactly where things worked or didn't.
The one I've written about before is in regards to healthy eating. I split "Eat Healthy" on my Lights Spreadsheet into two things I try to do in a day:
1. Eat Healthy -- Plan2. Eat Healthy -- Execute
In my experience, there's a tremendous difference between eating junk food as a result of no plan to eat healthy vs. a failure of execution and followthrough when you have a plan.
The vast majority of the times I've eaten poorly, it's been a result of not having a plan for where to get easy, fast, convenient good food. Transit days, the restaurant is closed, there's nothing in the refrigerator, or whatever else.