For CLAT preparation all you need is one book that is Universal's Guide to CLAT & LLB Entrance examinations.
I know this sounds pretty unbelievable but trust me this book is your only need. With more than 11000 Multiple Choice questions, it has previous years questions of CLAT as well as other law entrance examinations. Not just that, it even has mock test papers. This is your one step solution for law entrance examination preparation.
With so many questions to brush up your knowledge, it also includes the whole syllabus of CLAT and other law entrance examinations. From General Knowledge, to Legal Aptitude, to Logical Reasoning, even English! Everything is there in this book.
You wouldn't have to touch other books if you follow this one.
Other than that, you can also refer Lakshmikant's Indian Polity and NCERT textbooks of History, Geography, and Political Science for basic preparation. Make a habit of reading newspaper daily, for this purpose, "The Hindu" is highly recommended. You may also follow Yojana Magazines for current affairs.
Keep a watch on news, using social media and Television to be successfully updated with current affairs.
Keeping the above in mind you'll have to make your own schedule. See, I don't know about your daily routine, that how much time you spend in different activities from school to tuitions to your leisure time. I don't know how much is your aptitude and capacity that how much you'd be able to complete in one sitting. I have told you what to do but you'll have to devise your own schedule in order to get the answer of "how" to do the above. :)
P.S : Reading would increase your vocabulary. For budding lawyers, "10 judgements that changed India" by Zia Mody and "Legal Eagles" by Indu Bhan are great books. They are not specified for CLAT preparation but will help you a lot in your journey of becoming an advocate.
Hope this helps.
The Syllabus of CLAT includes a total of 5 sections. Here is the section wise syllabus of CLAT-
1. General Knowledge and Current Affairs- 50 questions for 50
2. Legal Aptitude- 50 questions for 50 marks
3. English- including Comprehension questions 40 for 40 marks
4. Logical Reasoning- 40 questions for 40 marks
5. Elementary Mathematics-20 question for 20 marks.
In case you are looking for an all inclusive guide then the best one is- Universal's guide to CLAT and LLB. Other good guides for the same are- Arihant's guide for CLAT and Pearson's guide to CLAT.
Here are some tips for preparation for each individual section of CLAT along with individual sources for each.
General Knowledge - The GK Section includes both Static GK as well as current affairs. For gstatic general knowledge you can refer to the Concised size Pearson or the Arihant’s guide.
For current affairs, first of all develop a habit to read newspapers daily. The Hindu is the newspaper preferred by various CLAT Aspirants. It not only builds a strong base for General knowledge but will also help you in your verbal ability section.
There is a site called GK today.in which you can go to for current affairs. They have daily quizes based on current affairs which has been proved very usefull for CLAT preparation.
English - In case you are looking for a separate book For Vocabulary you can refer the book Word Power Made Easy by Normal Lewis. You will come across various words while reading the newspaper too, prepare a list, go through them regularly and try to use them in sentences. You should read the Editorial section of the Hindu for your Reading section as well as Vocabulary section of CLAT. For the reading section practicing your sample questions while timing it would prove usefull.
For grammar you can use the Wren & Martin.
Mathematics - The weightage of the maths section is very less in CLAT. Also the syllabus included elementary level of Mathematics. Hence, if you purchase an all inclusive guide, then practicing for it would suffice.
Logical Reasoning - For Quantitative aptitude in case you are looking for a separate book then quantitative aptitude by RS Aggarwal can be used. Other wise Universal's guide to CLAT or Arihant guide is also sufficient for CLAT. Make sure that you go through the previous year question too.
Legal Aptitude - Universal’s guide to CLAT and LLB, Pearson CLAT Guide are considered the best for this section. Fo through the basics of handling the questions of this section at first, and then utilise it to practice from these guides or any other source online, previous year papers etc.
Make sure that you go through the past year question papers and practice them along with sample papers. This will help you to have an idea about how to attempt the paper, the level of questions for each section, and how to manage your time well.
If you are planning to take any coaching in institutes like Career launcher, Bulls eye etc then their reading material covers all aspects. You can refer the books listed above in case you need separate books for any or the sections.
Best of luck!