Thought I'd share my favorite company that offers the most freebies:
What I've received free-of-charge in the past 6 months.
Go to their Facebook page, "Like" it, then you'll know about free offers you can claim.
When you claim an offer, you'll get an email that you can print out, or just show the employee the coupon on your phone:
If you don't have a smartphone, just take a picture of the coupon with a camera or your camera phone and that works too.
Have fun receiving freebies!