Be prepared to E.A.T. O.D.
Educate yourself. As a new member of the armed citizenry dedicated to preserve, protect and defend the Constitution against all enemies foreign and domestic you must raise your own level of martial knowledge and that of your friends and fellow patriots. A partial reading list:
1. Guidebook for Marines. http://www.usmcpress.com/guidebook.htm If you are able to buy just one book, get this one.
2. The Tiger's Way: A U.S. Private's Best Chance for Survival by H. John Poole. http://www.amazon.com/Tigers-Way-Privates-Chance-Survival/dp/0963869566
3. Light Infantry Tactics for Small Teams by Christopher E. Larson. http://www.amazon.com/Light-Infantry-Tactics-Small-Teams/dp/1418472077/ref=pd_sim_b_3
4. Six Ways In, Twelve Ways Out by the USROG. http://www.usrsog.org/manu.htm
Finish those, pass 'em around, and then dig into these nonfiction works:
Band of Brothers by Stephen Ambrose
Blackhawk Down by Mark Bowden
King's Mountain by Hank Messick
Paul Revere's Ride by David Hackett Fischer
Small Unit Leadership: A Common Sense Approach by Col. Dandridge M. Malone
The Battle for Hunger Hill by MG Daniel P. Bolger
The Minutemen by GEN John Galvin
To Shake Their Guns in the Tyrant's Face by Prof. Robert Churchill
Washington's Crossing by David Hackett Fischer
We Were Soldiers Once, and Young by Gen. Hal Moore
And these novels:
Gates of Fire by Steven Pressfield
Ender's Game by Orson Scott Card
Once an Eagle by Anton Myrer
Rifleman Dodd by C.S. Forrester
Starship Troopers by Robert Heinlein
The Defence of Duffer's Drift by Lt. Backsight Forethought
2. Arm yourself. Rifle, handgun, shotgun -- in that order. Another necessary book:
Boston's Gun Bible by Boston T. Party.
Buy the best rifle you can afford that is in common caliber with your friends. Buy enough ammo to practice with it regularly until you attain proficiency. A $129 Moisin-Nagant in the hands of the man who has practiced with it is more effective that the $2000 semi-auto tack driver in the hands of someone who hasn't. If all you can buy is ammo, that's fine. Stock up on the caliber you'll be using until you're able to get a rifle. BUT DO NOT WAIT.
3. Train yourself, or find training.
Your first priority is fitness - physical training. Tough but imperative.
Your second priority is practical marksmanship. Places that teach it:
Gabe Suarez. http://www.suarezinternationalstore.com
There are others local to you, no doubt. Beware the risk-averse training provided by some. We're not talking about the minutiae of concealed carry, but how to put an opponent down hard and fast. Ask questions before enrolling.
The third priority is military training -- how to shoot, move and communicate with your buddies. Here you're going to have to improvise. Find others willing to train with you. Start with buddy teams and then move up to fire teams. Then squads. Uncertain how to proceed? See some of the Praxis pieces (and their attendant comments) by The Trainer on this blog.
Organize yourself, your family and your friends. As above, build fire teams and squads. Assign duties to non-military persons, supply and so on. Establish caches for supply. Build communication networks. Reach out to like-minded law enforcement. How can you help them do their duty?
Defy. All the preps in the world are not worth a thing if you don't have the WILL to use them.
That's it. Sounds simple, but it is not. Organizing militia folk is like herding cats and chickens at the same time. It can be done, but not without extreme effort and massive headaches. That doesn't mean it can't be done, just that it is tough. Given the payoff at the end, why wouldn't it be?