Well…that’s a very broad question.
Since you’re using WordPress, you already have feeds available. For example, your web site feed is here: http://www.hostingwebsitedomain.com/feed/
In general, for every page in your site, you can get an RSS feed by adding “/feed” at the end of the URL. Sometimes they just show the comments for that page, sometimes (in the case of category/tag listings) a list of posts.
