Bath and Body Works – free Wallflowers or Scentport pluggable diffuser starter set with ANY in store purchase (so, you can buy a small travel-sized item or a clearance item and still get the free item):

http://f.chtah.com/i/34/528207786/20081022_wfcoupon.html

(FYI – I don’t think this can be used at outlet stores)

Arby’s – coupon for a free Beef & Cheddar sandwich:
https://secure.fishbowllocal.com/apps/arbys/join.asp?sssdmh=dm24.143354

Free chocolate! – Free sample box of gourmet chocolate truffles (who doesn’t love chocolate!)

http://www.haydeechocolatier.com/sample.php

Not free, but still fun:
Cover Girl – sign up to join the Consumer Advisory Board:
http://www.join.consumershare.com/covergirl.asp