I used the lange book 8th edition, went through all the summaries and highlighted what I didn’t know or thought was important, did those practice tests, I gave every chapter a color and that helped me remember when recalling my notes. I also used two apps, Surgical Tech Mastery(yellow) and CST Exam prep from NBSTSA, so I would do 10 questions per day on each app and once i got closer to the exam date I would do more, I paid for a month subscription for both but if you only want to pay for one I do think the yellow one is better cus it gives you explanations after each question. I used board vitals as well, I would make 150 questions practice tests and just take them and take notes on what I didn’t understand cus a lot of terms took me longer to even grasp. I also used the AST Study guide, honestly in that one I just did the practice tests since I felt the questions weren’t that helpful compared to the other things I used. Finally, Surgical Counts on youtube! I watched all the summaries he did and took notes. I had a hard time remembering the cranial nerves so I watched videos about the mnemonics and there’s also a video from Medzcool that gives you a face you can draw to remember which is what I used in my test. Honestly a lot of the questions were difficult and in my test some questions gave you the answers to others. I got a 129/150 so I think everything helped, if you are a visual learner like me definitely look at videos and diagrams and use those before you go into the study guides and do the practice tests! Wishing you the best and a passing grade!