That pillow trick is legit and I still use it. Behind frames is smart but don't forget the backs of shelves and anything hanging on the wall, because those are the spots that buzz the worst. I've also had good luck with those little felt pads they sell for furniture feet, the sticky kind, just cut them small and stick them where the frame touches the wall. Costs a few bucks and no holes in the drywall. Only thing I'd add is make sure whatever you stuff back there isn't too thick or the frame won't sit flat and you'll get a new rattle.

Started printing two charts at once. Cut my wait in half.

Wait, that 3 percent open rate on the correction is pretty normal actually, correction emails always tank because people already saw the first one. The 28 percent on the original is the real number that matters, and losing it to a leftover draft note is brutal. We do the two-eyes thing on subject lines but honestly the draft note problem is a whole different beast, you gotta check the actual sent version not the doc.