I took the Mechanical PE. Looking back, one thing that I believe really helped me; I took off 4 Fridays leading up to the exam and spent entire 8hr days at the library. I would sit FULLY ENGAGED and work problems / sample exams with all my reference materials. This was quality study time and prepared me for the exam day experience. Get used to working with earplugs. Overall, I probably logged ~260hrs including online class time.