Views are named after actions they display.
Name the view file after action name, in lowercase.
Examples: PeopleController::worldPeace() expects a view in /app/views/people/worldpeace.thtml; MonkeysController::banana() expects a view in /app/views/monkeys/banana.thtml.
You can force an action to render a specific view by calling $this->render('name_of_view_file_without_dot_php'); at the end of your action.