I'd recommend all new licensees listen to this audio interview with Frank Cook.
http://www.brokeragentnews.com/audio/expert/cook.html Than go out and buy his book "21 things I wish my broker had told me". You need to get your head around the concept of "owning a business vs. working at a job". Most agents fail because they don't properly prepare for the shift. It's harder then working as an agent, in my opinion.
I've heard that Keller Williams offers some of the best training (but I don't particularly like the "multi-level marketing" splits on commissions) and many ReMaxes use Brian Buffini's 100 days to greatness system. Wherever you go, understand this. Training and education are something you'll have to seek out.
You'll really need to be discipled in order to succeed. Think of it as the difference between high school and college. In high school (your job at the phone company), you're told your schedule, what courses you have to take, and when school's over you have your free time.
In college (real estate career) no one tells you what to study, when to go to class or how to spend your free time. Of course, you have to pay for it, you must decide what to get educated in and you'll find your free time taken up by the enormous amount of studying you'll have to do to pass your classes.
The former doesn't demand a lot of disciple, the later takes a tremendous amount. You're going to be on your own a LOT. Know that going in.....