What are potential problems to avoid or be aware of in designing and using surveys?
Stating questions in biased ways and getting unrepresentative samples are just two of the problems.
I searched Google under the key words "common survey problems" to get this:
http://www.google.com/search?client=safari&rls=en&q=common+survey+problems&ie=UTF-8&oe=UTF-8
In the future, you can find the information you desire more quickly, if you use appropriate key words to do your own search. Also see http://hanlib.sou.edu/searchtools/.