You can buy a binder organizer at most retail stores such as Wal-Mart and Target, as well as OfficeMax and similar stores. If you don't mind waiting for shipping you can also find them on a few different websites.
walmart or zellers
Coin shop
You can find it at Staples.
One can buy a DVD storage binder from Best Buy where there a number of such items available for prices between $5 and $40. They can also be bought from eBay and Amazon.
You can always buy a folder or a 3-ring binder. If you're gonna be holding small notes, I recommend you buy a jar or a basket. If you are not holding alot of notes, buy a pencil box to hold your notes.
i'd say staples if you live in Canada
buy one
In the closet with the boys.
One can buy an Avery binder at the official website, Avery. Amazon, Staples, Office Max, Walmart, Target, On Time Supplies, Overstock, and Sam's Club also lists these binders on their websites.
When you buy the collecter binder
A three ring binder is a solid Structure
at wall-mart or other stores like target and k-mart