A new feature has just been added on the Gmail labs section.
You can now create a Google Doc from any email message.
How could that be useful?
Imagine a situation where you would like to start writing a new document based on some information you have just received via an email.
Moreover you can now quickly edit and format some email text, and immediately share it with others as a Google Doc. (Avoiding the traditional way of forwarding an email message, or composing a new one with only the important bits.)
Enabling the “Create a Document” functionality
If you would like to enable “Create a Document”, go to:
Settings -> Labs -> Create a Document -> Enable, scroll down and click on on “Save Changes”.
Open any email message, and click on “Create a document” from the menu located on the right.
You should immediately see the following screen, and get a new Google Doc based on the selected email.