Free one year membership here:
Free NRA Membership
If you're not a member, join today.
If you are a memeber (lifer, myself), check out and contribute to these fine organizations:
Gun Owners of America
Jews for the Preservation of Firearms Ownership
Second Amendment Foundation
Buckeye Firearms Association
Ohio Gun Collectors Association
Then after that, go buy a gun or three.
Lots of ammo.