I've been alternating my intense piece-work with mindless knitting.
Take one ball of cotton yarn, Sugar 'n' Cream works well
One leftover plastic produce bag like the kind oranges come in
and a pair of size 10 knitting needles.
These take about a half an hour each and that includes cutting the plastic into strips and tying the ends together to make 'plarn', plastic yarn. I made four as samples for the ladies at work that were going to help demonstrate ways to reduce and reuse plastic bags by making plarn and knitting or crocheting with it. This is my own pattern but there are lots of ideas for creating with recycled plastic at My Recycled Bags.com. Thank you Cindy!