Check level accuracy by looking at bubble, then flip level 180 degrees. If reading is the same level is good. If reading is different trash level.
Make a hole and take a picture with flash to look in dark places.
Prevent door from clicking shut.
Attach cork to keys when boating.
Use zip ties to eliminate screw holes when attaching baby gate.
Some foam rubber to prevent car door nicks.
Caulk back of rug and let dry to prevent sliding.
An alternative to a knife.
Magnet behind switch plate to hang keys.