Sure, you should go through them again. Although it's good to test your skills on new material, there is still a lot to learn from the Official Guide. It's all about
why the answers are right and what is the best way to get there.
Here's my recommended review process:
1) Do a few problems in a timed set.
2) Review the problems BEFORE checking the answers. (See below)
3) Check the answers and re-review as needed. ("Oh really, the answer is actually D? Let me see if I can figure out what I did wrong.")
4) Check explanations (in the OG or, better yet, in our Navigator
https://www.manhattangmat.com/storeitems ... ItemID=336). Compare to your work and note the big takeaways from this problem. What are you doing well? What can you do better? What is the best way to approach a problem of this type?
Questions to ask yourself when reviewing:
*What is this problem testing, and how can I tell?
*How else might I have solved the problem? (Try a few different ways and see if you get the same answer or a different one. Which takes longer? Which is most natural for you? Which one would take some practice to develop?)
*What tricks/traps were there, and what practices on your part would make sure you didn't fall for them?
*What is the optimal approach to this problem, and how can I tell?
*(For verbal) Why is each answer choice right or wrong? Where is the support for my answer?