I set up a drawn circle with salt on my floor, and then starting in the north invite the elements to celebrate with me, asking that no harm come to anyone as a rult and that the circle be protected throughout the ceremonies. At the end, I simply do everything backward, giving thanks to the entities or anyone else that has come through, and bid them safe journey home. You can find more traditional methods of circle casting by reading any ofther Gardenarien books, which are the most ritualistic and strict teachings of formal witchcraft, or something by Scott Cunningham, such as Guide for the Solitary Practitioner.