Need help in getting better asap!!

I gave a mock and I got 150 marks today , when I usually attempt mocks I get 210+ in just 2.5 hours but today I felt like I had less time then usual ,my next mock is on 18th what should I do to get better marks ( I have everything completed but still not good in IOC) My physics is complete and I usually get 80+ marks in it but today I got 60 only I don't know what to do I still think there I a chance I can get 225+ marks can anybody give me some advice to get better