http://www.carcare.org/car-care-guide -new link

https://www.obtampons.com/entry.jsp -this was posted before, but it’s a new contest so you should be able to enter again. Make sure you check the sample box below the form

http://survey.email.coty.com/SensorPro/Run/SR.aspx?SurveyId=350f4..-probably just a postcard sample