Usability studies start with simple user feedback.
Jakob Nielsen teaches you the basics of how to question your visitors regarding the usability of your site. This is especially true for subjective satisfaction and possible anxieties which are hard to measure objectively. Questionnaires are also useful for finding out why users visit your site and what features they particularly like or dislike. Surveys don't work for getting feedback on new design ideas . The way to get user feedback on new designs is to build a prototype and get a few test users in to try out the prototype.