I did most of the 1001 questions in physics, chem...and orgo. I have the PR science workbook. Should I now work through the PR book in all four subjects...or redo the 1001 books. Also, at this point, i have reviewed all the material from the EK books. is it better to just do lots of problems for the PS material and continue to just study and memorize the BS stuff...or should I just do problems for all of them? Thanks.!!