Firstly see how your interests are connected to each other and how they relate to the vast interest cloud that exists on the world wide web. Secondly, get hints as to what other subject matter are closely related to your interests.
Map the world wide web based on subjects. See clusters of information out there and how they are connected. Than see your own interest map emphasized on the whole map. This will also show you other interests that are bordering your map of interests.
Like google, who want you to leave their search result page as fast as possible (because you have found a good result in the search), we want you to find what you want on a specific topic. This will build your trust in us and make you return again. This is a highly desirable result in today’s world of finding things where you happen to be (Twitter, Facebook etc.)
Build a news site for each subject where all the news is sourced from somewhere else and only the best news items are curated and presented to you. When you (hopefully quickly) find something interesting you just click over there to read it. Then come back for more.