Creating a study schedule that allows you to regularly solve previous years' papers for economics optional can greatly enhance your preparation for the UPSC exams. Here is a step-by-step guide on how to create an effective schedule to achieve this:

1. Assess your current knowledge: Before you start solving previous years' papers, assess your current knowledge of the economics optional syllabus. Identify the topics you are strong in and the ones that require more attention.

2. Get hold of previous years' papers: Collect previous years' question papers for the economics optional subject. You can find these papers on the official UPSC website or other reputable sources like EduRev.

3. Divide the syllabus into topics: Divide the economics optional syllabus into smaller topics or sub-topics. This will help you organize your study schedule more effectively.

4. Create a study plan: Allocate specific time slots in your schedule for solving previous years' papers. It is recommended to set aside at least 2-3 hours every week for this purpose.

5. Set realistic targets: Determine the number of papers you aim to solve within a given time frame. Start with a manageable number and gradually increase as you become more comfortable.

6. Practice regularly: Consistency is key. Make sure to solve previous years' papers regularly, preferably on the same day and time each week. This will help you build a habit and maintain discipline in your preparation.

7. Analyze your performance: After solving each paper, carefully analyze your performance. Identify the areas where you made mistakes or struggled the most. This will guide you in focusing your further study efforts.

8. Revise and improve: Based on your performance analysis, revise the topics where you faced difficulties. Refer to your textbooks, notes, or online resources like EduRev for a better understanding of these concepts.

9. Seek guidance: If you encounter any persistent challenges while solving previous years' papers, seek guidance from your teachers, mentors, or peers. They can provide valuable insights and help clarify your doubts.

10. Track your progress: Keep a record of the papers you have solved, the scores you obtained, and the areas you need to work on. This will help you track your progress and make necessary adjustments to your study plan.

Remember, solving previous years' papers is an excellent way to familiarize yourself with the exam pattern and gain confidence. By following a well-structured study schedule, you can effectively incorporate this practice into your preparation and improve your chances of success in the UPSC exams.