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If your chosen niche has some famous people involved in it, you could include a list of these figures on your web site, along with a brief biography of each. This is not only something that ought to be easy to put together (there probably being plenty of information about them available), it could also feature keywords and phrases to help optimize the page for search engine positioning.  

You may find these pages generate significant volumes of traffic to your site if people are regularly searching for the people you include, in the search engines.