Agree with what Colin said, but it will be a judgement you have to make for yourself sometimes after reading the stimulus and question stem. I've also heard that you should almost always skip parallel structure questions because they are hard and take the longest (having to analyze 6 arguments instead of just 1 since all answers are arguments).

As someone who struggled so much with the first 9 questions and is now getting it, I'm solving these by telling myself to build the bridge from the premises to conclusion. Which AC gets us to the conclusion? Which AC ties the premises to the action that occurs in the conclusion? I feel like JY mentions this, but thinking about it like this has helped me wade through all of the words.

Per LSAC's FAQ section online, the testing center will give you 6 pieces of scratch paper and 2 pencils.