Email Tabs is my most used, favorite add-on. I use it all the time to save the full text of stories so I can search for specific items, references, etc later.
It is extremely useful, and allows you to select any your currently open tabs to include in the email, with links to each separate tab/story at the top of the email.

I can not say enough good things about this app.

(and oddly, I cant seem to find a place to contribute to / fund their efforts - hey guys, am I missing the "contribute $" link?)