Step 1: Take empty junk postage-paid mailing envelope, the type junk mailers will hope you will fill with checks and cash.
Step 2: Fill with a 16-page
Business Reply Pamphlet (follow "Business Reply Pamphlet" link at top of page).
Panel Two of the Mailer
Step 3: Think about the fact that they will have to eat the postage, the junk mailing scum. This should lead to;
Step 4: Laugh.