I use a cold sore eliminator that I got at http://www.eliminatecoldsores.com
It works incredibly well. When I feel a tingling sensation like I am going to get a cold sore or herpes outbreak I use the "zapper" as directed. I have had the product for almost two years and it has stopped virtually every outbreak. I highly recommend this product. They are bit expensive but I couldn't find the same product cheaper anywhere else. I figured I spend more on zovirax and it doesn't seem to work.