I try to bring something with me to do when I travel. My thing to bring of choice is needlepoint. Here's a before and after of the work I did while I was in Chicago.
I think you can see how much I've did while in Chicago by looking at the back of the needelepoint. By the way I bought this cute flower on eBay for 15.99 (with shipping) Which is a steal since it was handpainted. The artist is: Tapestry Bazaar of London.