Walgreens Money Saving coupon Tomorrow

Walgreens has a 5.00 off 20.00 coupon that is good only tomorrow Friday April 11.
http://www.walgreens.com/hotbuys/default.jsp -- that link should take you to the coupon - just print and spend.
This is how I may use this coupon...
Crest Whitestrips 20.00
Candy Bar .50
** Use my 5.00 off 20.00
Use the 5.00 Crest Coupon from Sunday paper
** Total oop 10.50
GET 10.00 back in Register rewards to use at my next trip -- That's 3 free gallons of milk.............So for 10.50 (plus tax) I may get: Crest Whitestrips, a candy bar and 3 gallons of milk.
That's just 1 scenario - I'm sure there are better deals- I heard the Aveeno deal is pretty good too.