Couponing: Attempt 1

So, I've been trying to figure out how people make these GREAT deals when using coupons. I've been following some blogs and gathering newspaper inserts. We got these great Procter and Gamble coupons in the Sunday paper today. So, I made an attempt to make some purchases today at Walgreens. I really screwed it all up! Two of the Register Reward coupons didn’t print up, so I went to the other Walgreens on my way back home to find out why. Well, I didn’t buy BOTH of the items for the one (I thought it was either/or) and there was no reason why for the other. So, I returned them both and got back MORE than I had spent on them, because I had originally used coupons. Well, now I just feel like I cheated the system, which was never my intent! Ugh…