I'd continue practicing the generators for PAT. With continued practice, you'll learn to get faster. I'd also do the sections you know that you can get through quickly. For me, I did angle ranking, then cube counting, TFE, folding, and then keyhole. Another great technique I used was the process of elimination by spotting one feature that differed between 2 answer choices and then saw which one was actually correct.
For RC, I was very slow at first but after doing lots of practice tests (like 6) I started getting faster and completing everything within the time limit. As I took full tests, my time continued to improve.
For QR, it's also mainly lots of practice. As you encounter a question that stumps you, I'd recommend doing more of that specific type of question (find some via Google) since the QR questions are very repetitive and of the same type.