devise

Questions on routing in Rails 3 with Devise

I have a few related questions. I am new to Rails 3 after taking a year-long break from Rails in general. I am using Devise for authentication and I have a controller and model called 'User'. So, I can use 'localhost:3000/users/sign_out' to log the user out. I want to put a link at the top right that says 'logout' so when they click on...