An online survey, quiz or questionnaire is a great tool to gather information. Use it to find out what customers think about you, or even just to find out from your friends or colleagues about which restaurant they'd all like to go to on Friday.
QuestionPro is a commercial online service that allows you to create online surveys, which people can then complete via a web page. The results are instantly available to you, simply by logging into your account. And there are loads of different question types, such as multiple-choice, free text, single choice, putting a group of choices into a preferred order, and so on.
QuestionPro is at www.questionpro.com and, while the service is commercial, they also offer accounts that are free forever and which will probably suffice for most of what you want to achieve.