Fontanalia
A Roman festival honoring the freshwater goddesses, the Camenae, oracular water-nymphs. Probably at one time this was a full moon festival (because of the date which would fall on the full moon if the months started as they once did with a new moon on the 1st). Wells and springs were garlanded.
Decorate your water sources. Use water as a means of divination, by scrying, gazing into a bowl of water looking for images.
Scrying:
Scrying is a form of divination where you focus on an object. In The Spiral Dance, Starhawk suggest focusing on a crystal ball, a bowl of ink, a dark bowl filled with water or a mirror with a black-painted surface. For best results, dim the lights in the room or light a candle. Burning incense may also help to create the appropriate atmosphere.
I've never had much success with scrying but Starhawk says it takes several sessions before anything happens and I've only tried it once or twice. I know it requires a certain attitude of letting go, of seeing without looking, an indirect attention. After all you don't really see the images with your physical vision but with your psychic vision.
According to Starhawk, after a time the crystal ball (or surface of the water) clouds over. For some people the clouds clear and images appear. Others close their eyes and see images with the inner eye. To end, let the clouds return, then disperse. As with all forms of trance (and other magical techniques that involve traveling between the worlds) cast a circle before you begin and be sure that you are in a safe place where you will not be disturbed.
Luisah Teish in her book Jambalaya describes her method for scrying. She recommends a clear glass chalice or bowl, washed in salt water and allowed to drip dry. You charge the water with you breath by inhaling while holding the edges of the bowl, then exhaling and pushing the breath through your palms and into the water. Light a white candle and place it to one side of the bowl. Sit in a relaxed position and look into the glass through the sides and top. At the start, do this for five minutes, then stretch the time to fifteen minutes.
Starhawk, The Spiral Dance, Harper San Francisco, 1979 (revised and reprinted 1989)
Teish, Luisah, Jambalaya, Harper San Francisco 1984