Sites such as Survey Monkey allow a layperson to easily create and administer a questionnaire. However, the only thing I know about polling is that you can't just create a questionnaire, let anyone answer it, and get valid results from it.
Is there a layperson-accessible guide to the problems and (hopefully) solutions to creating Internet-based polls from which valid conclusions can be drawn? If not, what would be the best route for a small-business owner unable to afford hiring a national polling company?
(I'm not sure that this is on-topic for Cross Validated, but it seemed like the closest match...)