My rule is that if I've made 3 mistakes in a row, then the quilt gets put aside until I can rethink it. By the 2nd mistake I'm saying "pluck a duck" under my breath. Substitute a common curse word for pluck, as I do. My most recent nemesis was a jelly roll rug - lots of ducks plucked on that one and it's still just a pile of rope. Prior to that it was Jenny Doan's Disappearing Hourglass - only ever made 4 blocks of that one and those were enough.