Casting Sacred Space by Ivo Dominguez, Jr., T. Thorn Coyle

The use of casting as a means of establishing sacred space is a common practice in Wiccan and Neopagan traditions. In fact it is widely considered the most important step in spiritual and magickal work. And yet few really know how to do it or do it well.

InCasting Sacred Space, Neopagan practitioner Ivo Dominguez, Jr., offers a comprehensive introduction to the techniques and rituals of casting, including:
How to become grounded and centered before one begins