I dry lots of oregano. Usually in August-September. Cut branches and hang up in a cool, dry place (my garden shed) and after 2-3 weeks its properly dry, then I pull off the leaves and put them into glass jars. Keeps a good deal of the aroma, and, I think, most of the taste. There are several kinds of oregano, I have recently been using the yellow-leaved variety, which is very decorative and dries well.