I've always enjoyed visiting Walmart.com.  One of my favorite things that the website provides is free samples.  I have signed up for and recieved many free samples from this site.  Suprisingly, my sample seem to arrived rather quickly as well. 

The sample currently featured on the Walmart website is Garnier Fructis's new Triple Nutrition products line.  All you have to do is visit the free samples tab at the top of the homepage, enter some basic information about yourself, then hit submit button and your sample is on it's way.