Invision yourself with a blue glowing energy around, protecting you from harm. Concentrate and chant:
You can use this alternative also, but remember, the best is always what you feel.
"I conjure Thee, O Circle of Power, that thou beest a boundary between the world of humanity and the realms of the mighty spitirs. A place of joy , love and trust to preserve and contain the power we shall raise within. I have called upon the protectors of the East, South, West and North to aid me in the construction of this Circle. In the name of the Horned Lord and the Radiant Lady thus do I conjure thee, Great Circle of Power. The Circle is cast."