Convenience Items

We all come across the familiar scene when we enter the check-line...A bombardment of all sorts of candies, snack food and magazine. These are placed here hoping that something will catch the customer's eye as they wait. The price will be low for the item but you will receive less for your money that way. I know that I consciously try to keep these two things in mind when I am standing in line. If I look at the candy and see something that catches my eye, I don't purchase it unless I am willing to get out of line to go back to the candy aisle to get the more cost effective version. Are they ultimately getting what they want by my actions when I do this, yes, but I feel more like I was not taken in by the specific strategy they were engaging in. My only admitted weakness when it comes to this sort of marketing is gum. When I see a new flavor of gum I have not tried and they haven't introduced the three packs for 2.00 of it, I usually buy at least one pack of it. How often do you buy these convenience items by the check out counter and what do you find yourself usually buying?