Just learned how to knit two at a time! I have second sock (and mitten) syndrome really, really bad so this is a lifesaver!
Just started some mitts, here's the pattern: https://www.ravelry.com/patterns/library/doppelbock-mitts
Congrats! It's one of those things that definitely looks really intimidating but once you get over the "I need more hands" stage it's not so bad. Definitely a gamechanger for second sock syndrome!