For those of you who believe that you've got a great website or are in the process of developing something truly miraculous and need traffic, contact the guys at Digg and various other social bookmarking websites. Cnet can also be really helpful.
If you're idea is really good...they'll probably ask you for a few background details about your website(or idea), maybe arrange for a meeting and feature it in an article. This could result in a tremendous boost in targeted traffic flow. Really helpful if you've got something great - otherwise they pro'lly won't give you a second look