Want to make sure potentially customers link about you when they try to visit one of your competitors? then add their URLS into you keyword list.
If you add your competitors URLs into your keyword list then every time someone types them into Google your site will appear hopefully just above their site, grabbing you some extra business.
mm, this could be interesting, i did try this a few years ago but Google kept giving errors when i tried to submit.
I will have to give it another try as being able to but a competitors URL in your keyword list could be very advantages, as you can make sure a potential customer will always see your name and advert when they are are trying to go to a competitors site.