I used the The Agile PrepCast (Premium) and the PMI-ACP Exam Simulators. I started by watching all the videos and I took notes - and I listened to them again, sometimes while doing housework sometimes. They were entertaining and educational. I also used Mike Griffiths PMI-ACP Exam prep book. I read it thru 3 times and also took notes. I did three of the prepcast simulation exams and I scored between 81.7% to 84.2%. They took me around 2-2 1/2 hours each.
The exam took me the full 3 hours. I did the online version from home around 7:30 pm. This was after a long day of work and I found some questions difficult to understand. Perhaps I was too tired. I often used process of elimination. When you know the concepts, it works pretty well even if you can not understand what they are asking in the question. As an example, if choice A is "Drive the screw in with your hammer" and Choice B is "Drive the nail in with your screwdriver", it doesn't really matter what the question is, you can eliminate these two options.
Thank you Prepcast!
Hope this helps. I wish everyone the best of luck.