I'm a little late to the party, but I've been having fun with hyperbolic crochet. For those of you who don't know what hyperbolic crochet is, I encourage you to visit the website for the Institute for Figuring. If you want to make your own hyperbolic crochet, download the PDF here: Hyperbolic Crochet instructions.
I made my own pseudosphere the other day, out of some yarn I bought on clearance.
Since I had some yarn left over, I made a scarf. It's sort-of hyperbolic. It's a fancier version of a ruffle you'd see on a clown, but I love it.
What do you work on to relax and recharge?