Couponing 101 - Walgreens

I'm not going to lie here - took me a while to figure out how Walgreens works.
Actually, it's pretty simple.
To make the most out of your $$$, check out Walgreens weekly flyer + monthly booklet (tons of extra coupons there) + any other online printable manufacturer coupon you can get, of course.

Example:

Diapers are on SALE for $9.49
Walgreens is giving me back $2.00 *Register Rewards
1/$3.00 OFF online manufacturer's coupon
I paid $5.49 BUT, I've got $2.00 *RR

*Register Rewards
You can earn Register Rewards when you make a qualifying purchase of eligible item(s)
advertised in our Weekly Ad, or an in-store promotion.
Your Register Rewards coupon will print out at the register, with your receipt, to redeem on
your next shopping trip.

How can you use Register Rewards? Make multiple consecutive purchases.
The $2.00 RR you've got from the diapers can be used on your (right away) next purchase.

IMPORTANT: the number of manufacturer coupons, including RR manufacturer coupons, may not exceed the number of items in the transaction: example HERE.

Official Walgreens coupon policy