I don't buy much; other than food, gifts, and household supplies. But working in a supercenter I see so many "ooh, I need that" items. I'll have a, "$2 for that storage tote!!!" moment, or "wow, that toy would be perfect for my son" instance. I just thought of a new "fun" challenge for purchasing stuff. Every time I see someTHING that I "need" or think of an item that I want to purchase I am going to write it down on a list and date it. 30 days after it's been placed on the list I will decided if I "need" the item and it will be purchased or removed from the list.
I like it. I think this will be beneficial. I'd already decided to record all of my THING purchases again this year like I did in 2010 and 2011 but this adds a new aspect to it.