Free sample of Emergen-C
You have to be a subscriber to the Emergen-C newsletter to get this freebie. If you are not signed up, go here and click on "Sign Up," them come back to this post and click the top link to fill out the freebie form. There's no telling when the company will run out of samples.
Or, you can sign up to receive a free Emergen-C sample of the classic orange flavor. Look for the "Free Sample" bubble in the upper right corner.
Caveats: limit one per household. The sample takes a few weeks to arrive.