Hi,
There's nothing to panic.
1. Analyse the time you are left with to give the UPSC exam.
2. Memorize the SYLLABUS so that you don't have to look into the syllabus whenever you start something new.
3. Accordingly prepare a STRATEGY with not much flaws and stick to it during the entire preparation.
4. Read the HINDU NEWSPAPER daily.
5. Finish the NCERT books of classes 6th to 12th. That gives a strong base and gives you the confidence that you knew something about every new topic you start with.
6. Refer the internet or videos on the standard books that you should complete. Stick to one book for each subject. That leads to less confusions and builds your confidence level.
7. Start with your wisely chosen OPTIONAL SUBJECT. And then with GENERAL STUDIES papers one by one.
8. Mean while spend atleast 45 mins for each papers like CSAT, ESSAY & COMPULSORY LANGUAGE PAPERS.
9. Devote the three months before prelims exclusively for prelims.
10. Don't give the prelims if are not prepared atleast 70% for mains. Because it's very hard tackle through the cycle.
11. Crack the exam with all the pride !

! ALL THE BEST !

You have to start your preparation with basic books like ncerts...And Previous year question paper...and syllabus...
...I am going to tell you 5 important pillars for UPSC...

•1st~Go through the syllabus

•2nd~Get the important Booklist

•3rd~Previous year Question Papers

•4th~Plan and strategy

•5th~Determination and Dedication

•••
Important Must Reference books--~
•1. M.Laxmikant- polity....
•2. Spectrum-History...
•3. GC Leong -Geography...
•4. Ramesh Singh- Economy...
•5. Shankar IAS - Environment
•••
Download UPSC mains detailed syllabus from website----www.iasscore.in--