I've seen other sites offer separate RSS feeds for each of their categories. So I found out how to do it and thought I would post it here in case others would like to know too.
For categories:
http://example.com/category/categoryname/feedBe sure you use the SLUG and not the category name. For example: My category is World of Warcraft. I wouldn't put
http://gamerofsorts.com/category/worldofwarcraft/feed. I would use the slug and it would be:
http://gamerofsorts.com/category/world-of-warcraft/feedTo find the slug just go to your categories section on your dashboard.
For tags:
http://example.com/tag/tagname/feedFor specific authors:
http://example.com/author/authorname/feed/