How have I never heard of this? A neat, straight paint line at the top of a wall is tough to achieve next to a bumpy ceiling. So before you paint, drag a narrow flat-head screwdriver lightly along the ceiling. You'll get a clean paint line and no one will ever notice that the bumps are missing.
How to Fix a Sinking Driveway: Another way to fix a sunken driveway is to use gravel and concrete paver blocks. http://www.familyhandyman.com/smart-homeowner/diy-home-improvement/how-to-fix-a-sinking-driveway/view-all