Is there a way to have clipboard buffering in OS X?
I would recommend something like Jumpcut:


  Jumpcut is an application that provides "clipboard buffering" — that is, access to text that you've cut or copied, even if you've subsequently cut or copied something else. The goal of Jumpcut's interface is to provide quick, natural, intuitive access to your clipboard's history.




Flycut is another option.


  Description: Flycut is a clean and simple clipboard manager for developers. It based on open source app called Jumpcut.