Room Blessing

Face each direction (with arms out in appropriate elemental invoking gesture), and say, while channeling and visualizing elemental power:

"Powers of (say direction),
Powers of (say corresponding element),
We great you, we honor you, we welcome you here!
Watch over and bless and protect this place."

After each invocation, shape the energy into columns of light by sweeping ones arms together until they are parallel and sweeping them up and down while channeling and shaping the energy,
When the energy is properly shaped, say:

"So mote it be!"

After you have done all four quarters, channel in spirit energy.
To return the energy to a more mellow state while energizing yourself, put your hands out and take in a bit of the energy into your self from each direction, going widdershins, hold hands to your heart and take in the energy (techniques also exist for bringing it into a stone and retrieving it when needed).