I was rendering a video yesterday (which is hours of "hurry up and wait" time) so of course I played about ten levels of Dr. Mario, but I also wanted to craft. Recently I strained my right wrist -- I have very weak wrists but do so much by hand that this happens about once a year to me -- so I knew it couldn't take any concentrated knitting efforts, so instead I learned how to make these little crochet hearts.
I learned from this video tutorial -- I've never done a magic ring or whatever before, but it was easy enough to learn. These literally take two minutes each, so I ended up with a bunch of them by the end of the afternoon. (The sizes vary because I used three different sized hooks.) And you know what? I'm going to make more today.