Surveys are a great way to find team consensus and get everyone's opinions - especially anonymous surveys. While you could use blank sheets of paper, another way is to offer a web survey. A great tool for that is Survey Monkey. I've taken several surveys with them before, but what I didn't realize is that you can set up a free account, and start sending out real surveys right away - almost like setting up a free hotmail account. Of course there are limits, and they sell packages for more advanced features and quantity. However, for small and simple online surveys of 20 people, the free product works great.