I have to agree that it's a good idea to review your previous practice exams and determine if you had any timing issues on some of the easier quant questions. Based on what you've shared, you sound comfortable with most of the concepts, but the only way to know for sure is to dive back in to your previous practice CATs and look for patterns in your test taking. If you're struggling most on the "easier" quant questions, perhaps you're rushing through reading them or even making silly mistakes that are holding you back.
I would usually ask if you've taken a full practice exam, but based on the fact that you're about to dive into AWA, I would assume not (feel free to correct me if I'm wrong). If this is the case, I'd strongly suggest taking a FULL practice exam to truly understand where your strengths and weaknesses on the exam are, which will allow you to hone your study plan to attack those areas.
Economist GMAT Tutor