you can sign up on overture and google adwords to make your keyword listings, its all about bidding for the keyword you wanted to use, there are lots of strategies in PPC campaigns but for starters I highly suggest that you look on your budget first. by the way there are lots of tips on the net you might want to read... try to read this one and also you can visit youtube if you want a visual guide on how to use it. http://www.highrankings.com/ppc-campaign-tips