Some interesting questions designed to get you stressed and hot under the collar.
http://www.businessballs.com/interviews.htm#stress%20and%20pressure%20interviews%20questions
More questions:
http://www.jobinterviewquestions.org/questions/interview-questions.asp
Punchy tips for doing well in interviews.
http://uk.youtube.com/watch?v=XvuZY3DWtIY