The Non Slip Loop Knot. The strongest loop knot you can tie. Used by big game anglers worldwide. Easy to tie, far stronger and more reliable than the old fashioned strangulating figure eight knot that can substantially weaken line.
Stretch a rubber band over your gallon of paint to swipe the extra paint off of your brush. (If I manage to do this without spilling the entire gallon of paint getting the rubberband on, it's truly a genius idea.