Take your Stanley knife and hold it at a 45 degree angle and cut out a channel that your wiring will fit into.
Keep sharp blades in this knife at all times! It makes the job so much easier!
Your wiring will fit inside this channel just perfectly! I really loved finding out about this so much. You put your wire for the interior fixture into the channel that you have just cut and tie a small knot (interior side) in the wire to keep it in place. The next step is to carefully put a line of glue around the edge of the channel that you have just cut out,being very careful not to get it near any of the wiring. Glue a piece of Bristol board over the channel so it is protected. You can check your wiring after the bristol board has dried to make sure that you can move it freely and no glue has touched it. If you have a light source outside at that point(my porch light) you then make a hole in the bristol board and feed a wire from the outside into the channel and tie a loose knot in that to have it stay in place until you are wiring up your lights. You can coil both wires up and tape them to the interior wall while you paperclay the exterior wall. Your wiring is completely covered up and protected!!
It is such a great method to wire a house!!! I am hoping that when I am at a point to attach lights and the final step of connecting the wiring underneath the house it goes smoothly!