Free Samples - Printable Grocery Coupons - Online Coupons This is by far the BEST free sample website out there. All you do is register (free) and they list a billion free samples you can get! They have nutrition, pets, free magazines, etc. The samples of Gas x and the protein shake I posted were from this site.
Walmart also has a free sample site.
Walmart.com - Free Samples & Trials They are fast with shipping, but they don't offer as much as the other site. I just signed up for some free Tide!
So if you like free samples, sign up!
Be prepared to spend a lot of time. There's some great stuff out there!