Old doorknobs as hooks either painted to match the colour scheme or kept rustic. Love the idea of this whimsical look. Door knob towel hooks Gardeners Cement trowel hooks Doorknobs as hooks Doorknob hooks.
When hanging a picture frame, put a dab of toothpaste on the frame where you need the nails to be. Then simply press against the wall to leave marks (which can later be wiped) as guides for hammering in.