So you start writing letters fellas, alot of them, you'll need to.
Good, but not good enough. You need a lobbying presence in Washington D.C., and the NRA is it. Simply stated, the NRA has the power and influence to directly affect legislation, and the NRA's ability to lobby is unmatched by any other organization. There is a reason that the Brady Bunch, Bono, and some Democrats rail against the NRA and not against other pro-gun groups.
What do I do to protect my rights? I own guns. I buy more guns. I teach my children to shoot. I regularly (when in the states) take my friends to the shooting range and give them the opportunity to practice and shoot weapons that are new to them. I teach other people the value of firearms ownership and the second amendment.. I do a lot more good than the NRA and a lot less harm.
Still not enough. You can buy and shoot tons of guns in your lifetime, and it still cannot serve as a substitute for effective lobbying of those who actually pass federal legislation.
One final comment: I know that the NRA has compromised in the past. But sometimes you have to compromise. When an American President is murdered with a firearm, the writing may be on the wall -- restrictive firearm legislation is going to be passed. The question then becomes what to do. You can either refuse to compromise (and save no rights when the legislation passes), or you can lobby to compromise and at least save some of your rights. On the other hand, there are appropriate time to refuse to compromise. For example, legislation was recently enacted which protects gun manufacturers from silly lawsuits by cities who argued that the manufacturers should be liable for the use of firearms by criminals. The Democrats proposed a compromise: they would allow the legislation to be enacted if the Republicans agreed to another "assault weapons" ban. The NRA lobbied the Republicans to reject the compromise, and to simply pass the legislation. It passed. Think that the legislation is no big deal? Ask the gun manufacturers, who were spending tens of millions of dollars in attorney fees and costs to defend against those stupid lawsuits. The NRA may not be perfect, but it is extremely effective.
Ask the law-abiding citizens in New Orleans about gun confiscation by the government, and they can tell you a thing or two about who went to Federal Court and successfully obtained a Court Order to stop that foolishness.