Greetings,

Make a proper timetable so that you can complete your syllabus in a timely manner.
Start reading newspaper. It will really help you.
Take syllabus and previous year papers of this exam and analyze them. Find out what is the nature of the exam, what kind of questions UPSC ask and what is the level of toughness. You will get a clear picture that will help you in the long term. This analysis will help you in developing an approach to reading books from this exam point of view.
Start your preparation from NCERT books.

Here is the book-list for this exam-

The Books are recommended-

Current Affairs- Newspaper, Any monthly magazine ( you may skip at this stage and start when you are one year away from prelims examination)
Ancient & Medieval History- NCERTS- Our Past I & II, Themes In Indian History I & II
Modern Indian History- NCERTS- Our Past III, Themes In Indian History III, Spectrum book
Indian Polity- Lakshmikant
Indian Geography- 11th & 12th NCERTS, G C Leong, Atlas
Indian Economy- 11th & 12th NCERTS, One standard book
Indian Art & Culture- NCERT- Introduction to fine arts, Nitin Singhaniya book
Environment & Ecology- Shankar IAS book
Science & Technology- NCERTs, Current affairs

Booklist for GS mains-

Indian Culture NCERT- Introduction to fine arts, Nitin Singhaniya book

Modern Indian History NCERTS- Our Past III, Themes In Indian History III, Spectrum book

Indian Society 11th & 12th NCERT, Current Affairs

World History Arjun Dev

Geography 11th & 12th NCERTS, G C Leong, Atlas

Post-Independence India NCERT, Pradhan Mantri Series on Rajyasabha TV

Constitution Lakshmikant, Current affairs

Polity Lakshmikant, Current affairs

Governance Lakshmikant book on Governance, Current affairs

International Relations Current Affairs

Agriculture Sriram IAS notes, Current affairs

Economy Sriram IAS notes, current affairs

Science & Technology Current affairs

Environment Shankar IAS book, Currents affairs

Disaster management January 2017 Yojana

Internal security Book By Ashok Kumar IPS

Ethics Lexicon book

You are to complete the prelims part first. Try to cover those areas first which are common in both Prelims and Mains.

Now one important thing is when you are preparing for the Civil Services Examination, NCERT books play a crucial role in your preparation. In hypothetical language, these books are the backbone of your preparation..

Hello Mansi.

It's really a good decision that you are going to prepare for civil services early.

For this you should purchase the relevant books of your stream go through them and I suggest you to join test series online or offline. It will help you in evaluating yourself.

In last year of your graduation if possible you should join any good coaching institute.

Ok.

Good luck.