Another medium for conducting surveys is through the phone. On average these surveys tend to be a lot shorter than their online counterparts. Keep in mind that most people aren't as alert or willing to take a survey outside of the workplace, so the phone survey is usually quite short and to the point.
If you need to do phone surveys (or polling) go to a company that specializes in this service, otherwise you could be facing a lot of hangups. Aside from conducting the surveys, many of these companies will also provide: