<p>The 1000 SAT words from SparkNotes proved to be a decent source. DirectHits vol 1 and 2 are also good.</p>
<p>But the best method I’ve found is using the plethora of SAT wordlists on quizlet.I just do tests on 3-4 different word lists (all of them containing over 100 words) and write down words I don’t know into my own wordlists/dictionary. From what I’ve studied so far, I can allege that they’re around 2000 words the SAT test makers use to compile the answers for their sentence completion questions.</p>