Perhaps you are already on top of things and you are dehydrating herbs, but I couldn't help but post this idea. Although I've had a dehydrator for years, I really hadn't done any herbs. I finally got after it and I love the results!
Recently I dried some parsley that I knew wasn't going to be used before it went bad. Along with it, I dried some sage from a plant on my patio that needed thinning as well and some mint that was just about to be caught in the first frost.
Update 2/21/10: I now just dry them stem and all. When they're done, I simply crumble the leaf off into a bowl, then seal in a jar with my vacuum sealer.