What you'll need:
Two or three rowan twigs, about ten inches long
A Bottle of Ale
A piece of red ribbon
A small personal power chant (optional)
What you'll need to do with these things:
Gather the rowan twigs, but be sure to not cut them from a living tree. They should be found on the ground so as not to harm the tree and they also must be found at this length, not cut down to it, as that will diminish the power of the wood. When you find your twigs, pour the ale deosil (in a clockwise circle) around the base of the tree as an offering to thank it for its gift to you as well as to symbolize the potency of the spell you are about to work. With the red ribbon, bind the twigs into a cross or star shape (depending on how many twigs you use) and concentrate on the safety of your home and its inhabitants as you do this. If you've written a short and personal spell, this should be chanted here while you bind the twigs.
Place your rowan cross to your forehead as you focus on the power of your intentions, then to your heart as you feel your power, then to your lips. Seal the rowan's power in the cross with a kiss. Starting with those rooms furthest from your front door, carry your cross in your outstretched power hand, circling each room fully while feeling your intentions plainly and clearly. When you reach your front door, exit it backwards so that your cross leaves your home after you do. Secure it above your front door.
This ritual may be repeated every three to four months to ensure the potency of your talisman.
Photo courtesy of Floraworks (internet on...off...on...off) on flickr.