I had trouble with med/surg, I failed the 1st time with a 74.5% and the 2nd time I came out with a 83%(which passing is 76% or above. Some advice I could give is 1. Learn the chapter objectives 2....
I recently took med/surg. In my opinion cardiac and endocrine are the most difficult sections. Flash cards and a digital recorder helped me and also a workbook if your book company offers