Hello,

Since you have not mentioned which group you are appearing for I will try to keep my advice generic. In either of the cases( single group or both groups) these are the points that will help you out.
1. Make a proper schedule
Most common mistake is that students do not make a proper time table for themselves, and even when they do, they do not follow it properly. you should be devoting roughly 8 - 10 hours in feb and march and 12 - 14 hours in April. So it is always helpful if you have deadlines and know by which date you want to wrap the syllabus of a particular subject.
2. Be through with the study material and practice manual
I cannot stress on this enough, there is no way you can clear the exam, let alone get a rank if you do not complete the study material and practice manual atleast twice before the exam, no amount of work can help you if you skip out on the books of the institute.
3. Be neat in your presentation
Use of flowcharts and diagrams is advisable. specially in theory subjects like Law, audit and ITSM. As we all know, no one can mug up the entire book word to word, so therefore your aim should be to convey your point while remembering and quoting the right sections ( you will have to retain the important ones)
4. Assess your performance regularly
There is no point moving forward with your preparations if you do not stop every few weeks to assess yourself, join a mock test series of the institute or of some other coaching class, this will give you dual benefit. one you will be able to know whether you can complete your paper in three hours and two, you will know which sections lack practice before appearing for the exam, so you can work accordingly.
5. do not skip on the RTP
The rtp or the revision test papers are released by the institute roughly a month below the exams are conducted, and although no question is an exact rip off form the rtp, similarities have often been found, for example, values are changed while question is maintained along the same lines. So you must solve the current attempts RTP and also if you have sufficient time, then the RTP of last 3 to 5 attempts.

Hope this helps .......