How should one prepare for the SFM for the CA final?

While it comes to preparation of SFM Paper for exam you need to revise all the concepts of Aaditya Jain sir. After covering all the concepts just go through the questions he has provided in his book. All the questions are covered under his well printed books. You will definitely secure good marks .

You must take coaching from a good institute or a good and experienced teacher 

CA Aaditya Jain's notes are enough for preparation before the exams. You just need to revise the concepts as taught by Aaditya sir.