AFM discussion part

Hey guys, I will be attempting AFM in June and I have started solving past papers and I’m having difficulties especially in the discussion part, like sometimes I totally go off topic or my answer is too short (cannot really add value), so I want to know whether there are any tips and tricks that you guys can shared for me to improve. Like are there any steps that you followed which help you to do the discussion part better. Please help and thank you.