One handy feature of Acrobat 7 is that it allows users to add 'Document Information' (AKA metadata) such as title, subject, author name and a selection of keywords to PDF documents for simpler categorization and archival. Better yet, adding document metadata is a quick and easy way to take the pain out of tracking down your PDF documents the next time you need them.
OK, so you want to stamp your document. Maybe you need to give reviewers some advice about the document's status or sensitivity. This tip from author Ted Padova demonstrates how to add stamps with the Stamp Tool along with related comments.