This is my main thought at the moment; how do I learn more and how do I break it down so that I can actually make progress? Hope you don't mind if I kinda spew out what i have so far, it may either help you out or get "fixed" by those who know more. To keep things in perspective, I'm new as well, so don't take this as gospel.
0. Begin with the end in mind. (From Stephen Covey). Check out NTP 1.0 at (
http://thearma.org/houston/NTP.htm). List each bit for NTP 1.0 and study it until you know it. This gives you a "I should know this" list as well as "I'll save that for later" one. One big failing of people new to anything is trying to get everything at once. They say about 12-18 months for this, so take your time and don't guilt yourself if it doesn't come immediately.
1. Seminar/Teacher. Yes. Best way to get feedback on what you're misunderstanding from the books/website. My closest is a couple hours away and when I make the trip I know the effort will be worth it.
2. Book. Yes. Biggest lack, for me, is a detailed index/table of contents to reference the stuff listed for the NTP requirements. Great book though; breaks things down well enough to start and when you do get with a skilled teacher you'll be able to translate it back to the book.
3. "Know thyself". Not sure who said that, but it certainly fits. I've done some martial arts before and I know some of my own weaknesses. For example, I have a really bad habit of executing a technique and then forgetting to recover and defend in case my opponent wasn't so overwhelmed by my skill that they just fall over and gave up.

So my practice includes routines of guard - move/defend - move/attack - move/recover. I also forget to move enough, can you tell?
Figure out what you're good at and develop that as a strength. Find your weaknesses and train them to not be so vulnerable.
4. "Stick with the basics" Probably said by every teacher I've ever heard. Going back to the book and NTP comment, there are 14 "guards" listed in the book. Start with the first 5 and get them down. Actually, my favorite is the middle (pflug in german or corona in italian). Absolute favorite! It has so many offensive and defensive options that as beginner I think I 70-80% of my techinques begin and/or end here. Even the overhead strike from the back guard goes through here because you have the last moment opportunity to pick another angle of attack or defend if your opponent tries a counter-attack. You also have easy transitions to many other guards.
Though I've never done ARMA free-play I really think success will come more from well practiced basic techniques than a less skilled but wider variety. At least that's what I'm working on. <img src="/forum/images/icons/smile.gif" alt="" />