A remedy for pre-approved-anything or other unwanted junkmail
(that comes with a prepaid return envelope!)

Write on the header that contains your contact information:
Please remove me from your mailing list. Thanks. (By law, companies are to abide by your request).

Stuff everything into the postage paid envelope. And I mean EVERYTHING including the envelope it came in, any literature. In short, send back the pile of trash they sent to your house. Since the postage is prepaid and is determined by weight, this message costs the company money and is, sadly, the only and most sure way to stop or reduce this type of correspondence.

Voila, you have taken a step to save trees and free your attention from yet another bit of information. :-)