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Ring Notepad
These business card-sized index cards are so darn useful. They have a hole punched on one end and are held together with a loose binder ring, so you can remove, replace and rearrange cards at will. Use them for flashcards, or keep one by the phone at work so you can flip back through for old numbers you need again. They have a plastic protective cover and come in several sizes and colors.
$2 at Container Store

