Windowsill gardening

I've started a little garden on my windowsill with a mixture of purchased plants and cheating. Right now I have potted basil, Greek oregano, German thyme, rosemary, cilantro, and--in a fabulous win in the chemical-free produce battle, watercress growing in a plastic tray filled with water. I bought two bunches and have been cutting off about a quarter of a bunch at a time for salad, leaving about 3/4" of stem. It's sprouting back at about the speed of my appetite for watercress. Yay fresh!