I’ve completed all the SAT official study guide and online practice tests from collegeboard, what should I do now? Review or take more practice tests? If I should take more practice tests, which ones do you recommend? Thanks in advance! 
Suppose you were going to be hired to teach in an SAT course. Do you feel ready to explain the answer to any question in the tests you have “completed”? If so, you probably don’t need to do any more prep. If not, then you are not done with those materials just yet.
@pckeller teaching is actually an excellent way to review! My 3 kids are all two years apart and my oldest helped my middle child with his PSAT/SAT and now my middle child is helping my youngest, guess we’re going to have to adopt a neighbor for my youngest to teach;-)