I've done plenty, mainly because thier is a psychic vampire/predator somewhere around where I live.
Anymore I just put some form of protection essential oil on my Runemaster Sword amulet, chant and charge it, and go on.
Before that, I would burn sage inscence, surround myself with a silvery Nocturnal energy, "bath" my aura in it, and then send the energy out throughout my house to cleanse it. And I called out to the spirits for a spirit protector, and I got one.
In Reiki, I was taught a way to "zip up" your energy field, and this method is also common amoung Shamans. Start by standing up, then let go of all negativity, and cleanse your aura. Then channel whatever energy force you feel more secure with, and move your arms down as far as you can, fingers stretched out, palms down, and then move your palms together, move your hands up, above your head, then back down, streching them out away from your body. Let your hands channel the energy, and after about 10 times, you'll start to feel the energy starting to form a barrier around you.