If you are wanting to send out mass mailers or want something easy to pick up, postcards are a great way to go. I have done some postcards that clients fill out, and then it is mailed back to them or to whomever they addressed it. It serves as a GREAT reminder of services, and it is not so forcefull, because they asked you to send it. I have also done postcards that are mailed to clients with a request to fill out the back, it is self addressed back to us.
Because of the heavier paper, postcards are great for just passing out information.
Front and back a mass mailer postcard.
Front and back of a postcard intended to be mailed back.
Front and back to a mass mailer postcard. This one is shown in a Print Ready format that is ready for the printer. It includes crop marks, bleed marks, color bars, etc.