SJ’s self-dressing hack:
When we started potty training there was a lot of backwards underwear-wearing, because it’s hard to tell which way girls’ panties go of there is no tag or bow. Sometimes my daughter would get it wrong even if there was a tag and then complain about being uncomfortable because they fit wrong backwards, of course. So I started drawing "bellybuttons" on the fronts in a small "o" shape with a Sharpie and told her to match up the marker "bellybutton" with her real one. They never went on backwards after that.
Ah, the beloved Sharpie. This reminds me of the hack that helps kids get their shoes on the proper feet.