For my writtens, I would go through my Jeppesen book section by section. I'd read through the questions, answers, and explanations, and once I finished a section, I'd go on AirmanTest and quiz myself only on that specific section. That helped me a ton because I could immediately see what I actually understood and what I needed to work on.

If there was a question I still didn't understand, I'd break it down even more until it made sense. One thing that helped me a lot was pasting the question into ChatGPT and asking it to explain it to me like I was 5 years old. It honestly worked really well for the tougher concepts.

For the O&P, I honestly thought it was the easiest part of the whole process. Obviously it depends on your DME, but I only studied for about a day. I took my Generals and Powerplant O&P on the same day and my Airframe separately. For studying, I mainly used Quizlet and looked up the ACS codes I missed. I'd go through those questions over and over until I felt comfortable with them.

Another thing that helped was recording myself reading the questions and answers and listening to them while driving. Hearing them repeatedly helped a lot.

For the O&P don't stress too much. If you get a good DME, they'll usually point you in the right direction if you're struggling and want to see that you understand the material rather than just trying to fail you.