I failed AUD first time as well, passed with 75 the next time.
Here's what I did:
Read each chapter in Becker, re-read it again until I was getting 90% on all the MCQs,
Did all the MCQs & SIMS at least two times, and continued doing the progress tests.
I also supplemented with the Becker Final Review & Notecards.
I had Wiley test bank and Ninja notes, but didn't have enough time to go over them. I used Ninja topics for topics that I didn't understand in Becker.
I'm not sure how I passed because the exam was very difficult the 2nd time around, however, I used the Research Tab A LOT for the SIMS…that may have helped.
Just continue reading and do MCQs until you puke (heard that from someone, but it's so true:). Good Luck, you will pass next time…I know how you are feeling, but you WILL pass!