Telemarketers

All information is from www.snopes.com
Stop calling me !!!
Consumers who want to stop telemarketers from calling them at home can sign up with the National Do Not Call Registry managed by the Federal Trade Commission ( FTC) and enforced by the Federal Communication Commission (FCC).  Once you list your phone number in the registry, telemarketers must stop calling you at that number within 31 days.  If they fail to do so, you can file a complaint with the FCC. ( Cell phone numbers can also be listed in the Do Not Call registry,  but FCC regulations that block the bulk of telemarketing calls to cell phones are already in place.)
Stop the junk mail !!!
Returning junk mail to direct mailers on their dine (by stuffing it back in to their postage-paid return envelopes) may cost them some money and provide you with a bit of personal satisfaction, but it won't cut down on the amount of junk mail you receive.  In fact, it may actually increase your junk mail load, since the primary metric used to gauge the effectiveness of many direct mail campaigns if the number of responses received (even if those responses are negative). The best way to decrease the amount of unsolicited mail you receive is to register with the Direct Marketing Association's (DMA) Mail Preference Service (MPS).  The DMA maintains a "do not mail" file of MPS registrants which they regularly update and send to their member's, who are required to remove the listed entries form their rosters of prospective customers targeted for mailing.  (The file is also made available to no-DMA members, but they are under no obligation to use it).
"One Stop"  Opt - Out
Taking advantage of the "one-stop" opt-out option (by calling (888) 567-8688 or visiting the Opt-Out Prescreen web site) to prevent the major credit reporting agencies form making your credit information available for pre-approved offers of credit or insurance will also go a long way towards significantly reducing the amount of junk that ends up in your mailbox.