The funny thing is that if you review content well enough, you will know all the raw facts, but the test loves to make everything so damn confusing, so if you can get past all their tricks, you can do well. My number 1 piece of advice is to not panic. I've come across tough sections that look really rough. I'm thinking of one that involved a redox titration that was on a TPR test I took a week ago. I started panicking because I had no clue what to do, but as I started to read, the passage had similarities to an acid/base titration, but it mixed in electrochem.
Once you come across a passage, think of what the content resembles. Then go from there. Remember your fundamentals. AND DO MATH ON PAPER. No matter how easy it is, you will make a mistake from doing mental math. I have a bad habit of doing mental math, so I've started to write stuff down. I still get occasional questions wrong here and there from mental math, but it is considerably a lot less than when I did math in my head.
I haven't broken 33 yet, but that tip helps me do pretty well on the sciences frequently. I can't offer you verbal advice as it is my weakest subject but the tip I gave above helps me a lot.