Preparing for the UPSC Law Optional Subject Exam without coaching can be a challenging task, but with the right approach and dedication, it is definitely possible. Here are some steps you can follow to effectively prepare for the exam:

1. Understand the Syllabus:
- Familiarize yourself with the UPSC Law Optional Subject Exam syllabus.
- Divide the syllabus into smaller topics and sub-topics for better understanding and organization.

2. Collect Study Materials:
- Gather relevant study materials such as textbooks, reference books, previous year question papers, and online resources.
- Make sure to rely on trusted sources and avoid plagiarized or unreliable materials.

3. Create a Study Plan:
- Develop a study plan that suits your schedule and allows enough time for each topic.
- Allocate specific time slots for studying different subjects and topics.
- Set realistic goals and milestones to track your progress.

4. Study the Basics:
- Start by studying the basic concepts and principles of law.
- Understand the fundamental legal terms, concepts, and theories.
- Focus on building a strong foundation in diverse areas of law such as constitutional law, criminal law, contract law, etc.

5. Refer to Standard Textbooks:
- Choose standard textbooks recommended by experts and toppers.
- Read these textbooks thoroughly and make notes for future reference.
- Highlight important points and create short summaries for quick revision.

6. Solve Previous Year Question Papers:
- Solve previous year question papers to understand the exam pattern and types of questions asked.
- Analyze your performance and identify areas that require more attention.
- Practice time management skills by solving papers within the stipulated time.

7. Join Online Forums and Discussion Groups:
- Join online forums and discussion groups related to UPSC Law Optional Subject Exam preparation.
- Engage in discussions with fellow aspirants and experts to clarify doubts and gain insights.
- Share your knowledge and learn from others' experiences.

8. Revise Regularly:
- Regularly revise the topics you have studied to reinforce your understanding.
- Make use of flashcards, mind maps, and mnemonic techniques to aid memorization.
- Review your notes and summaries frequently to retain information.

9. Stay Updated:
- Stay updated with recent legal developments, landmark judgments, and amendments.
- Refer to reliable sources such as legal magazines, newspapers, and online portals for current affairs related to law.

10. Practice Mock Tests:
- Practice mock tests and sample papers to improve your speed and accuracy.
- Analyze your performance and identify areas of improvement.
- Work on your weak areas and revise accordingly.

Remember, self-discipline, consistency, and perseverance are key to cracking the UPSC Law Optional Subject Exam without coaching. Stay focused, follow your study plan, and believe in your abilities. Good luck!