The Best of Intentions

Dang it! I went to the store for one thing and came home with many things! I am such a sale schmuck. While we're on the topic though, I have to say Back To School Sales Rock. When I moved I had to leave behind all of my art stuff, and I just replaced a bunch of stuff for, like, twenty bucks. Wee! That being said... is it even possible to enter a store with the intention of buying one thing and leave with only that one thing?