There is SO much information available these days!!!! Books, DVDs, the internet, youtube, online training programs...an endless amount of information. Hilight videos, technique videos, some even promise to tell you the secrets of BJJ, the secrets of strength and conditioning, shortcuts to get better at grappling...some charge money, some are free. There is an awful lot of stuff out there. How do you separate the good information from the bad? What will help you? What won't? What is real stuff and what isn't? Where do you start? Where do you go?
One thing to remember in grappling and BJJ....it is a VERY VERY large buffet! There will be some dishes you like and want to eat all the time. There will be some dishes that you like to have once in a while. There will even be some that are literally crap. But how do you know where to start? How do you know who's advice and techniques to listen to?
I'm actually talking about this on two different levels.
One is a general overview of BJJ. There are tons of techniques. In this case, the only way you'll know what works for you and will become part of your game is to try everything out. Sample the whole buffet. Keep the ones you like, let go of the ones you don't (but only AFTER you really try to do them...just because you don't like them right away or they don't feel "right" the first time doesn't necessarily mean you won't eventually get them after a bit of practice. Or you may come back to them some time later on down the road). Of course, if they don't work or you can't make them work for your body type or style after serious attempts and some drilling, you can let them go...but you won't know any of this unless you try them.
The other level is considering the source of the information. There is a lot of information out there that is just not good. I remember hearing a saying many years ago (MANY years ago and not even related this sport): "consider the source". It's always interesting to read someone's very authoritative post or instruction on an internet forum and then later find out that it's a two month white belt that's posting. Not that there's anything wrong with being a two month white belt because everyone always has a different point of view or a different perspective on things...but it's not quite the same as someone who's grown up doing it their whole life or even someone who's put in their 10 years or whatever of cumulative mat time.
What I am trying to say is:
You have to sample a lot of things to find the things you like and work for you from which you will build your game AND
You also have to be a discriminating consumer and consider what is being given/sold to you.