What do you think is the most difficult purchase (of everyday stuff) & why? [View all]

...For me it is buying food. I walk up and down the aisles and look at this and that and end up buying
much more than I need. Yes, I got a list, but the adventure to the food store is indeed an adventure.
I look at the list, and get most of the things, and then go looking for stuff not on the list. Sometimes
when I am waiting in line to pay, I get an idea and get out of line and go look for the "idea." With the
list, I was sure I had it all together but I guess that is just another idea to put on the next..."list"