You can take a short survey and possibly get a free sample. Have also been told that if you don't qualify for a free sample you will get offered a coupon for $3 off 2 products. I answered strongly agree to the questions and I got a free sample. Not sure if the answers decide if you get a sample or if it's random. To try for a free sample head Here!
*Picture is not mine it's from the John Frieda website*