Knitting is one of the best stress-relievers I've ever found. Depending on the situation, I've had success with either super intricate lace and cables (the kind that require so much concentration it'll make you forget whatever it was you were worried about) or super easy projects that just keep your fingers moving and distract you a bit with the rhythm.
These are Mini Christmas Stockings by Gemma Towns, a free download. I used worsted weight acrylic instead of the sport weight wool that the patterns calls for. Aside from a few rows of short row shaping for the heel and three rows of decreases at the toe, it's all mindless stockinette. And they're not boring, because even with only a couple of skeins of yarn, there are plenty of color combinations and striped patterns to try.
This post is linked to I Gotta Try That, Sew Much Ado, Finish it Up Friday, Can I get a Whoop Whoop?, Get Crafting Friday, Pinworthy Projects, and Freedom Fridays, Wonderful at Home, and Inspired Friday.