Hey
Prashant10692 ,
Since you are at Q48, it means you already know the stuff that GMAT tests.
All you need to do is the following:
1. Be extremely careful while doing any questions so that you don't miss small points or do any careless mistakes.
2. Focus on 700+ level questions and determine how GMAT can make the questions harder.
3. Stick to Official or Manhattan Material only. The reason I prefer Manhattan is that they have harder questions and that can really make you ready to tackle the twisted questions.
4. Redo
GMATClub tests but make sure you are not exhausting yourself with lots of stuff.
5. Revise each question that you are getting wrong. Understand the mistakes and if its a concept gap, track it and learn it.
6. After every 4-5 days, review your error logs and do the questions again.
7. Work on the weaknesses that you already know and that you will determine while going over the questions.
Let me know in case of any concern.
All the best.