Walgreens shopping Help

I have been shopping at Walgreens for a number of years now and let me tell you, you can get some great deals there. But you need to know the guidelines.
#1 Use the coupons that are printed in their fliers along with a manufacturer's coupon to maximize your savings.
#2 Their registers print catalina coupons and register rewards. In their ad they will advertise that when you buy certain items you will recieve Register Rewards for $x, good on your next store purchase. You need to remember that it will only print one RR per each deal per transaction. You also need to know that if you pay with an RR from the same manufacturer as you are currently purchasing, the new RR will not print!
#3 Your coupon & RR count need to match or be less than your item count. So, if you have a coupon for each item you are purchasing you can not use an RR unless you add another item. You will hear of people using "fillers" (cheap, small items) to increase their item count so that they can use their RR's. The only exception is the in-ad Walgreens coupons, they do not count toward your coupon total.