These are about the easiest plants to prune. I just hack ‘em short and out of my path’s way. For the edible ones like rosemary and sage, I tie a small bunch together and hang them somewhere in the garage to dry. For the rest of the clippings, I use it as mulch especially around my roses. I never throw my perennial herb clippings away. Besides, I’m convinced they deter the ants and aphids!