Here are a few resources that I mentioned in the discussion on parameters the other night. they'll give you a feel for the variety of ways parameters can be deployed. Not all inclusive by any means, but will certainly get you thinking.
Sign Up | Tableau Conference Live - TC17: Parameters, A Love Story
Tableau Tip Tuesday: 12 Use Cases for Parameters - 12 Use Cases for Parameters - Viz Wiz blog
Retrieving data ...