My favourite part of GS is
Anonymous Poll
21%
History
14%
Geography
48%
Polity
8%
Economy
5%
Current Affairs
4%
Environment
You can't afford to mess up your polity preparation because that is something everyone works hard upon. On second number comes economy. These two are low hanging fruits.
With so many sources and topics, one is bound to get overwhelmed with enormity
Moreover even after reading 8000+ pages of current affairs, chances are that very less will be asked from that. Moreover, how to recall all that your read in those 8000+ pages
There is an irony here, and that is that those who target to cover everything miss everything
Best strategy is to identify high probability topics and read them in depth and leave others. You need to learn to understand how upsc frames questions, what topics they choose, how much depth they desire and so on. And without understanding all this, you will merely be trying to swim across a vast ocean.
Either get yourself mentors, or do it yourself by carefully going through previous 10 year questions that have been asked in UPSC CSE.
We wish you all the very best for your prelims. Don't miss to apply your knowledge and common sense to solve problems. Stay calm and be positive. Manage your time well. Good luck to you.