I'm going to do a series of posts on some of my favorite menubar applications. I thought I'd start with 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.
In addition to pulling your text snippets off the menubar, it also can pop them up inside your document with a bezel activated by CNTRL-Option-V.
This app is really helpful when writing just about anything and free! Check it out.