See, Pins are really the ONLY thing I buy, aside from gifts for others.
Very occasionally I might spend money on a collectable (sculpture, etc.) or a pretty book that's 'specially special (hehe), but rarely do I need the other "stuff" they have at WDW. I really won't buy anything that you can get anywhere else - so if I've seen it in a Disney catalog I don't buy it in the parks.
It's not too hard to control my spending in WDW, but then again I don't have kids with me begging for everthing in sight.
AEfx