The Massachusetts Attorney General has a very helpful section about Massachusetts laws and consumers - Consumers and Civil Rights.
National Consumer Law Center has a number of helpful PDF files you can download and read if you have Acrobat Reader installed on your computer.
Download and install the free software from Adobe's website.
A User’s Guide to the Consumer Protection Statute
Stop Phone Slamming
Brochure on consumer rights when long distance phone service has been switched without the consumer's consent.
Tenga Cuidado Con Los Asesores de Immigracion Deshonestos (español)
The Truth About Credit Reports and Credit Repair Companies