“Treat your password like your toothbrush. Don’t let anybody else use it, and get a new one every six months.”
Clifford Stoll
Parts should go together
“All parts should go together without forcing. You must remember that the parts you are reassembling were disassembled by you. Therefore, if you can’t get them together again, there must be a reason. By all means, do not use a hammer.”
— IBM Manual, 1925