Here are different sites to register yourself on to opt out of annoying telemarketers and mailings. This list is from consumer reports and if you want to check the legitimacy of this information visit their website www.consumerreports.org
www.donotcall.gov
Registration is required every five years, if you registered when it first came out its time to renew this year.
www.optoutprescreen.com
This one stops preapproved credit card offers.
www.dmaconsumers.org/cgi/offmailing
This one costs $1 to register but it removes you from 3600 DMA member companies. Consumer reports, catalog companies and various other publishers.
www.privacyrights.org/ar/infobrokers-optout.htm
This site is for data-broker opt-out options.