One slightly strange thing I do is to tie a couple of bandanas to my handlebars. They're good for swabbing off, tying around your head to keep sweat out of your eyes, wetting and tying around your head or neck to cool down.
Saturday I would have had to stop and cool down longer because of salty sweat running in my eyes. Just tied on a head wrap and continued on.
Plus if you get different colors they are very festive. :D
