If you really want fair unbiased answers to your surveys, then you should make sure that you have no leading questions and no series of questions that will lead someone to a particular conclusion (& answer)

    

For example...

  'Please rate the President's performance in the following areas.'

  'Circle your answer for each question from the 3 choices listed.'

  'a) National Defense    Poor     Fair     Good'

  'b) US Economy          Poor     Fair     Good'

                ...