Next time you're in a public bathroom, instead of reaching for yet another disposable paper towel after washing your hands, try letting your hands air dry instead. I shake my hands rapidly over the sink a few times to get off excess water, and then sometimes gently pat them on my pants.
I discovered this little known method of air-drying when I was camping and realized that my hands dried naturally within minutes of washing them at a spigot, with no towel in sight.
Give it a try! Your hands will be dry by the time you get back to your desk. And we'll save a lot of pointless paper from landfills.