A lot of my test dealt with sectional charts, which I found to be the easiest if for nothing else, you have all of the reference points you need right there in the booklet they give you. Don't get me wrong, you want to go over how to read sectional charts and be familiar with them, but, all of the symbols, radio frequencies, altitudes, definitions, etc are all right there in the booklet you have with you during the test. These are the most time consuming though so what you may consider doing is going through all of the questions you can answer fairly quickly and then revisit those time consuming chart questions afterward, especially if you crammed information in your brain right before the test you are worried about forgetting.
I didn't have very many METAR / TAF related questions but just know how to find the relevant information in there. I think I had like 4 or 5 questions dealing with those. With those METAR questions, one approach is to look at your answers and rule out one or two right off the bat by plugging those answers into the chart and seeing the section you are being asked about. If you know the basics of those reports you shouldn't have any problems with those.
Keep in mind these are all multiple choice and they only give you 3 possible answers meaning the process of elimination and logic really help you with the odds if you get stumped.
For me, the 'toughest' parts dealt with odd definitions I don't remember seeing during my studying such as defining the ceiling as defined in aviation. Or, the vertical limit ceiling of class C airspace or something like that. But keep in mind those are only but a few, so even if you get them wrong like I did, you will still pass. You can miss up to 18 questions and still pass!
One thing I suggest is to go back through all of your answers thoroughly before you end your test. I know for a fact I caught two answers I would have gotten wrong because they were trick questions I didn't catch the first time. One of them had the right answer but instead of FAA they put FCC on the answer. (sneaky). The other one I can't remember for sure. However, even if I didn't catch those two, and I missed the weather charts completely, I still would have passed. I took 1 hour and 15 minutes to finish the test and I felt like I was being thorough and not rushed, so the 2 hours they give you is plenty of time to get through this test.
I answered another user through direct messaging with the link to that youtube video I was telling you all about. I didn't know if that was against the rules to post that publicly? I'm not gaining anything by referencing this video, I just like to give credit where credit is due. It was a thorough video with a link to notes as well as reference times to each subject matter in the video so you can go right to various sections you want to revisit.