The Energy Grid
Gathering as many stones as anchor points for your grid... if you perfer the pentacle (5 stones), square (4-8 stones), triskele (3 stones)... match each stone with a piece of copper. If it is feasible aquire a small piece of quartz for each stone as well (even shards will work) The quartz acts as both amplipher and focus.
Cleanse and charge the stones with your intent/purpose... be specific.
Magnetize the copper... Visualize the energy that naturally spills from your palms and fingers (natural energy sites of the body)... hold the copper in left hand while circling the right palm clockwise above the metal (you will notice a difference) then change hands and repeat on back of copper with other hand in opposite direction.
If you are using the square grid... Using a compass (if necessary) determine the directional points of the property...East, West... and so on.
If using the Triskele determine the 'First point' as the entrance.Thinking of the image of a boat bow where water slides by on either side. Using the remaining 2 points as anchors.
If using a pentacle... The 4 directions apply
Once you have your boundary established, walk the parameter visualizing the line you have drawn (literally on the psyhic plain) Bury each stone, copper and quartz at each anchor point. Again charging each point with intent & purpose. (Depending on your magical tradition, you may consider enlisting elemental aid for each point) In this manner you are creating a physical, mental, astral, and metaphysical boundary that can physically hold a charge through the copper, quartz and stone.
Once the grid is in place, you need to 'empty' it or discharge the negativity that has been attracted. To do this it is a simply matter of meditation and projection.
The Meditation
Use any perferred method of relaxation...
Travel inward until you have reached a state of calm, activated the chakras (if you use them) and can identify your own 'power source'... open it.
Visualize white light entering through the top of your head and traveling to this known point.
Allow it to expand outward, becoming a rich gold/white light.
Visualize rays of golden white light energy radiating from your physical body. . .
Take this light and send it out into the grids. . .
Follow it as it goes outward. . . upwards. . .pushing the area clear as it moves until you reach the light energies of the grids.
Flow through the grids becoming one with their energies. Rise it up and into a inter-laced dome or point 'roofing' the area.
*Having used this method myself, I perfer to see the points as columns. Kind of like posts that act as both anchors and generators for the energy held between them from point to point. In short, much like walls of light, static or moving energy.