I have this problem. It's genetic. I can't just BUY something I need. I have this strange compulsion to MAKE things that I could very easily (and in many cases cheaply) purchase.
Take for example, notebooks. They are readily available at pretty much every kind of store - WalMart, Target, Drug Stores, Big Lots, maybe even like Lowes.
However, a store bought notebook would not be good enough. I had to make my own with a pack of loose leaf, three binder rings and two pieces of chipboard. I embellished it with some tiny little banners (cut from Lily Bee papers). Voila.
Now, it's so pretty that I don't want to write in it.