[disneyfreq]

I think the ones I make most often are:

Forgetting to hand them the coupons

AND

Not reading the tiny "off two" print and coming to the register with only one.

I'm better about the second now that I've learned to look for "excludes trial sizes" and other such fine print details that can be very important but I still pull the first one every once in a while. I'll have a stack ready to hand over and I somehow drop one in my purse or leave one in the envelope. On the converse, I have had coupons in my stack where I didn't get the item but I forgot to remove the coupon. A big no-no I know but never done intentionaly. So I guess in the long run my mistakes cancel each other out.