Yes: you need to study things all together.
From now on, don't study just one topic or question type to the exclusion of others. Do a mix of SC, CR, and RC all together, and then review question by question, even though that means jumping around among different books and resources for the different question types. Ditto quant.
Read this:
http://www.beatthegmat.com/mba/2015/07/ ... s-say-whatYou may initially need to spend more time on SC and RC than the other areas because your skills have atrophied a bit in those areas, but don't make the same mistake this time: don't just do SC and RC and then have your CR and quant skills decline!
I'd spend the next week doing mixed practice, allowing you to continue practicing quant and CR while also brushing up on your RC and SC skills. Then take a practice CAT and analyze it.
http://tinyurl.com/analyzeyourcatsUse the results to figure out what you need to review next - but remember again to mix things up / study all question types and topics!
Here's what I'd do. First, read these two articles:
http://tinyurl.com/executivereasoninghttp://tinyurl.com/2ndlevelofgmatThink about how what you've been doing does and doesn't match up with that and how you may need to change your approach accordingly.
Spend the next week internalizing this kind of learning / reasoning and also doing mixed practice (everything!) so that you can continue practicing quant and CR while also brushing up on your RC and SC skills.
Then take a practice CAT and analyze it. Analyze the test (this should take you a minimum of 1 hour):
http://tinyurl.com/analyzeyourcatsBased on all of that, figure out your strengths and weaknesses as well as any ideas you have for what you think you should do. Then come back here and tell us; we'll tell you whether we agree and advise you further. (Note: do share an analysis with us, not just the raw data. Your analysis should include a discussion of your buckets - you'll understand what that means when you read the last article. Part of getting better is developing your ability to analyze your results - figure out what they mean and what you think you should do about them!)