...a few days ago I cast on for a 20s cardigan. 1921, to be exact, a Bear Brand/Bucilla pattern. (Yes, I know the above-named show is currently in 1920.)
I am using a soft peach colored cone yarn I bought on eBay about four years ago, and am praying that I don't run out! It's exactly the right gauge using recommended needles...per inch AND per row, and it looks swell.
I have also just done the first major frogging. Don't work even a very simple pattern with no shaping after 11:00 p.m. if you're tired. It's a bad idea (why is it, though, that I can manage after a martini? h'mmmm?).