This is the first circle casting I wrote completely on my own. I have only modified it once since writing it. I still use it for formal rituals and feel comfortable with it. There are many, many more techniques for casting the circle.

Cleanse the area. Set up the representations of the elements (candles/stones/natural objects/etc.) in each corresponding direction. Mark the circle (with chord/chalk/stones/candles/et cetera). Organize the altar.
Lift athame to the water dish and visualize negative energies leaving the water and evaporating in the air while saying:

May this water be cleansed so that it may aid me in my workings.

Lift athame to the salt dish and visualize negative energies leaving the salt and evaporating in the air while saying:

May this salt be cleansed so that it may aid me in my workings.

Sit for a moment, concentrating on visualizing any negative energies to leave the area. Starting in the east, take the water around the circle area deosil and say:

May this water, symbolizing the element of Water, bless and protect this area.

Take the lit altar candle around the circle area and say:

May this small flame, symbolizing the element of Fire, bless and protect this area.

Take the salt around the circle area and say:

May this salt, symbolizing the element of Earth, bless and protect this area.

Take the lit incense around the circle area and say:

May this incense, symbolizing the element of Air, bless and protect this area.

Walk around the circle area deosil beginning in the east (with a staff if you use one) and say:

This area is blessed and protected by the sacred elements. Only those called upon may enter here. All calm and gentle spirits are welcomed to watch from out side of the circle. May the elements ward off troublesome spirits.

Using the athame, walk around the circle area deosil, creating the circle/sphere with your energy, and say:

Here is the boundary of this sacred circle. Only love shall enter, and only love shall exit. So mote it be!

Feel the energy of the circle you have created. Know that it is there and sense its protective force.

Cast the circle. Invoke the Goddess and God. Sit comfortably in the center of the circle with a pen or pencil in hand. Clear your mind of any negative thoughts and clear your heart of any negative feelings. Visualize the circle glowing white and say:

I bless this circle in the divine name of the Goddess And the divine name of the God. May this circle become a sacred space in which Magickal verse is born. Let all negative vibrations and in habitations be Dispelled at once, And may I be deemed worthy to Receive the blessing of abundant poetic inspiration. Thank You, Goddess and God. So mote it be!

Write as much poetry as desired. Thank the Goddess and God Close the circle.

(This one I wrote myself using outlines of several dedication rituals. Although many people choose only one Wiccan or Magickal name, some people, including myself, choose up to three or more. The three are public, which is shared with all, magickal, which is used only in ritual, and personal, which is between only the Goddess, God, and the individual.)

Cast the circle. Invoke the Goddess and God. Take a few moments to meditate on whatever you heart is feeling at the moment. Kneel before the altar and say:

I, (mundane name) , call upon the Lady and Lord, and the Guardians of Earth, Air, Fire, and Water to witness that I, of my own free will, have chosen to walk the path of the Wicca. I dedicate myself to the Goddess and God. I promise not to use the craft to bring harm or go against another's will. I will not use my knowledge to impress others, nor use my powers to scare them. I promise to follow the Wiccan Rede to the best of my ability. I promise to continue to learn all that I can about myself, my craft, and life itself. I promise to strive to accomplish all Thirteen Goals, even if only one at a time.

If you have chosen a Wiccan name (whether it is public, magickal, or personal), now is the time to tell it:

As a token of my promise, I shall now take on the (public/magickal/personal) name (Wiccan name) . May the Lady and Lord recognize this as my (public/magickal/personal) name. May the Old Ones watch over me, as always, on my chosen path.

Thank the Goddess and God. Release the circle.