Ever get tired of creating the same document type, over and over, from scratch? Then don’t. Build a template instead. A template will have all the basic elements of your document in it (a signature block, a custom header/footer, whatever you need), saving you repetitive effort every time you create a new document.
What’s that? You don’t know how to create a template? You’re in luck. I’m about to build one for myself. And I’ll even let you watch over my shoulder while I do it.