I use a little trick with Outlook signatures, and from what I gather from talking to a few folks, not too many people do this.
Do you find yourself sending the same email over and over again to different people (“We’ll keep your resume on file”, “Here are the directions to our office”, etc.)?
What I do is keep these messages as an Outlook signature, and just call them up whenever I need them. It is a lot easier than trying to find old emails with the same message. And there doesn’t seem to be any limit to the size. Plus it keeps you “on message”, and you can tweak the text if you need to.