I setup an Adwords campaign and pick my keywords. But I DON'T want to pick keywords, I just want to target a website on the content network. How do I do this? Do I just delete my keywords, and also I don't want to appear on SERPS pages. Thanks!

You can do it with Placement targeting, where you just need to find out the relevant website to your targeted ads and go live with. No need of any keywords because it works more on the basics of Contextual advertising. You can check few links or can contact me on ran_pop@rediffmail.com