This is a meditation I've cooked up :) I've used variations of this to protect my home and self.
Imagine your home is a giant dragon egg. It's warm and comfortable (or cool and comfortable if you're in a hot climate). It has a tough outer shell and a light colored, see through inside. Imagine the outside as reflective if you want to repel things aimed towards you. Imagine the only thing coming through the pores are your guardian(s) and the God and Goddess. When you're done, say 'So mote it be'. You're done!