I recently found out about a pretty neat Glade promotion at Albertsons. Buy one Glade Scented Oil Warmer (on sale for $4.48) and get a $4 catalina at checkout. Apparently it's been going on for a while because I went to 4 Albies before I found a store with any in-stock! But when I did I used all my coupons up (some try-me-free's, a few bogo's and a few $3 offs) and ordered more on ebay (promotion ends 11/2 I think).
I bought 8 Glade warmers that cost me ~$6.xx out of pocket and got back $32 in catalinas good on my next grocery purchase. I'm going to use them to stock my freezer with meat for the winter!