Poll: How do you show your programming skills as a job candidate?

Do you show off your programming skills to potential employers by bringing demo apps or code samples or by taking online tests? Let us know.

Something that has always bothered me in the programming field is how we show potential employers that we know our stuff. In many (if not most) cases, we can't bring our current code outside our current employer's network. Putting together full-scale demo applications is time intensive. The computer-based tests are usually narrow in focus and show things like your knowledge of libraries or tools, not your actual programming abilities. Also, too many of the usual in-interview scenarios are unrealistic. When you look for a programming job, how do you show off your skills to potential employers?