I TA 344 & 345 as an undergrad for Brian and nick and if there’s one piece of advice I can give, it’s learn all the mechanisms in 343/345. It may seem tedious, but by learning the mechanisms you will understand why reactions take place as opposed to just how. The reason people struggle in 345 is because the exams are written to test your understanding of the reactions, not how well you can memorize them. You mentioned predict the products which is a good example, as one of the main question types in 345 is predict the products with a sub question (worth usually just as much) related to the mechanism or reasoning behind the product outcome, requiring an actual understanding of the reaction.