Copying this from the NRA website where I received my free one year membership. This is what you receive with the membership:
* 24/7 Defense of Your Firearm Freedoms
* NRA's Freedom Times Monthly E-Letter
* Your NRA Membership Card and Decal
* Savings on Hotels, Rental Cars and More
* Invitations to Friends of NRA Dinners and Celebration of American Values Special Events
Plus...
* Free Admission to NRA's Show With Over Five Acres of Guns, Gear and Outfitter Displays (with current membership) in Phoenix, 2009 - Charlotte, 2010 - Pittsburgh, 2011
Not too bad a deal for being free. Plus you boost their membership. What more could you ask?