Perhaps this time I'll actually do some stitching on the plane. I've discovered that if I keep my threads cut to a nice length I don't even need to worry about not being able to have scissors on the plane although nail clippers work pretty well. With most embroidery threads you can open the skein up and then snip one end for a perfect length. I read that tip somewhere. I thought it was a Rajmahal threads flier, but who knows since it was some time ago.
I have a travel stitching mesh bag that I bring with me almost daily in case I feel like stitching on the train to and from work. I have a set of DMC ziplock baggies connected by metal rings for my thread assortment. It makes it easy to flip through my threads, but then it isn't really possible to bring all the threads I have with me so I have to try to remember to pick out the threads that I want for a project ahead of time.
Here's project #1 - started several years ago as a color study during a Laura Cater-Woods workshop on a quilting cruise to Alaska:
and #2 - an experiment with gesso ala Maggie Grey's "Textile Translations" book:
and #3 - leaf gelatin prints on felt printed who knows when, at least a few years ago: