Adobe Acrobat 7 allows users a great deal of control when it comes to manipulating pages in your PDF documents. Acrobat 7's Document tab includes a range of useful functions such as insertion, extraction and deletion of pages.
Open Acrobat and open the Document menu.
Choose a function to perform on your document (e.g. 'Extract Pages', 'Insert Pages' etc.).
Specify existing documents to be inserted or to be used as replacements (if required).
Specify portions of the document to be deleted or extracted (if required).
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.