Have a chalice of water before you in the West.
Begin by sprinkling a few drops on yourself.
Imagine a waterfall pouring water all about you.

As the water cleanses you, it turns your aura a deep, blue color.
Breathe in the energy and color of water.
Once you are filled with it, allow the water and the blue color to spill over into the circle.

Finish this exercise by imagining the circle charged and filled with the blue color of water.