Celebrate your love for the late, great, and hilarious sci-fi/fantasy author Douglas Adams by carrying a towel with you everywhere. I imagine it's a great way to pick up like-minded nerds in coffee shops and bars tonight. "Hey, I couldn't help but notice your smoking hot beach towel. I can't place the pattern. Is that an Escher print or a representation of multiple Mandelbrot sets?"
More information on at: http://www.towelday.org/