Seth Godin has suggested that you treat new visitors to your blog differently from returning users. New users should be given context and background about you, and perhaps be invited to become permanent subscribers to your blog. Returning users should have quick access to your new material.
You could also consider turning off ads for your longtime subscribers. On one hand, you’ll forego ad revenue from a large group of people and prevent your advertisers from targeting a known group, but on the other hand, it might deepen the loyalty and increase the satisfaction of your biggest fans. Or you could do the opposite. Personally, I like the first more than the second.
For WordPress users, I wrote a WordPress plugin to do simple market segmentation. It was already the most visited page on my blog but traffic recently jumped with a link from the namesake last week. One blogger even created a graphic for it. Thanks.
Do you do any market segmentation on your blog or website? Where do you make the split, and how is the experience different?