My lead hand in Wichita said stop torquing by feel on the CRJ gear pins, and it stuck with me
He grabbed my wrench after I'd snugged a main gear pin by hand for the third time that shift and said 'your elbow doesn't have a calibration sticker,' which made me think about how many short cuts we all justify just because nothing has gone wrong yet, so I'm curious what lesser known habits you all picked up from an old timer that stuck.