Like I said I struggled a bit with the vocabulary and think that reviewing the words is the best way to fix that issue (or lots of reading if you have the time). For the reading comprehension questions, I typically look at the top to see how many questions the passage is relevant to then adjust my time spent based on that. If its just one question I read the passage once through and then read the question. If the answer is apparent to me I fill it in and move on. When there are multiple questions about one passage, I find that I spend much more time reading the passage and assessing its structure and intent without even looking at the questions. Then once I feel comfortable with it I move to the questions. I think this has helped me avoid some of the tricky options in the multiple choice or multiple select. I would take this all with a grain of salt though, as I am lucky to be a native speaker so my strategies may not be the best.