Congratulations on your PMP Exam Success! I am very happy, but I just passed that exam myself:)

It was quite a journey. Needless to say, that if one has a full-time job, several children, and parents that need your help, preparation for that test becomes challenging, and the key is to do as many practice questions as possible.
In my opinion, learning how PMI thinks was much more important, than trying to logically tackle these questions from my personal perspective.
Knowledge of formulas is very important. I used several sources:
1. All Learning materials from the LEarning Tree, Inc
2. All recommended websites by C. Fichter
3. I took an exam simulator, watched several useful videos
4. I took at least 5000 practice questions from difference places - my vendor questions , Oliver Lehman, Mr. Fichter, PMStudy, etc.
5. Understanding EVM is much more important than memorizing formulas
And last, but not least, studying the night before is not a great idea...makes you extremely tired on your test day.
The best of luck, everybody!!!