OK, this is simple, cool, and best of all free. It’s a Macintosh utility that expands your clipboard into cubbyholes. Each time you copy to the clipboard, you fill a new cubby without overwriting your last clipboard copy.
Using a menu bar item, or keyboard shortcut, you simply select the content you need and paste it wherever you want. Simple and elegant.
It’s called Jumpcut. Download it from the author’s Sourceforge page.