Instead of putting a paint smear across the outside of a can to mark the level of paint left inside (which can be messy and obliterate the label), use a rubber band instead. Put it around the can and roll it down to the level of the paint. Just by glancing at the rubber band, which is visible all the way around, you will know how much paint is left.
Magnetic tipped screwdrivers are handy for keeping a hold on smaller screws, especially in tight places where your hands can’t reach. You can magnetize your screwdrivers by rubbing a magnet down the blade five or six times in only one direction. To demagnetize, rub the magnet in the opposite direction.