Most of your learning comes from analyzing specific problems that you have already completed. The analysis tells you what you need to learn / where you feel short, and then you know where to go from there.
Here's how to analyze a problem:http://www.manhattangmat.com/articles/a ... roblem.cfm
Here are examples of how to do that analysis using specific problems, one for each question type:http://www.manhattangmat.com/articles/GMATprep-SC.cfmhttp://www.manhattangmat.com/articles/CR-assumption.cfmhttp://www.manhattangmat.com/articles/a ... estion.cfmhttp://www.manhattangmat.com/articles/a ... roblem.cfmhttp://www.manhattangmat.com/articles/a ... roblem.cfm
Go back and do this analysis on the problematic problems from your most recent CAT(s); from there, you'll come up with additional things that you need to learn, do, drill, or review.
Sometimes you'll realize that you don't have a formula or rule memorized, so you'll make a flash card and drill it.
Sometimes you'll realize that you didn't know some concept, so you'll return to your strategy guide.
Sometimes you'll realize that you didn't use the best solution method, so you'll return to wherever you can learn and practice that - which might mean a strategy guide or a tape of a class, but also might mean other practice problems of the same type. It might also mean posting a question on the forums.
Sometimes you'll realize that you made a careless mistake and you need to figure out what bad habit to break or good habit to make to minimize the chances of repeating the same careless mistake.
Sometimes you'll realize that you made that careless mistake because you were rushing, and you were rushing because you'd spent too much time on other questions elsewhere, so the real remedy is to fix the timing problems so that you don't feel compelled to rush in future.
And so on. :) Just remember that all of your study from now on is driven by an in-depth analysis of your actual thinking or reasoning through an actual problem - what went well, what went wrong, how you could do it better next time, and how you're going to remember that.
Here are some resources aimed at the specific areas you listed:http://www.manhattangmat.com/blog/index ... into-Math/http://www.manhattangmat.com/blog/index ... -problems/
For SC, check our blog for the next few days. I just wrote a new SC article that will be really good for you - it should go live tomorrow or Saturday, hopefully. (That article also has links to a bunch of other articles I've already written, but I'm not going to give them to you yet. I want you to read the new article first, and then you can follow the links to the old ones.)