Funny enough, I perpetually use the right-hand-curl rule before tightening or loosening a screw. Point my thumb in the direction I want the part to move, and rotate the tool in whatever direction my fingers point. I get made fun of for it occasionally, but I haven't accidentally tightened something I planned on loosening in a really long time. Thanks electrical engineering and magnetic field/current interactions! You've prevented me from breaking bolts and stripping screws!