Yes, there are several techniques that can help enhance your problem-solving speed using previous years' papers for Commerce. Here are a few:

1. Practice time management: Set a timer while solving each question from previous years' papers. This will help you become more efficient and improve your speed.

2. Start with easier questions: Begin by solving the easier questions first. This will boost your confidence and save time for more challenging problems later.

3. Identify common patterns and topics: Analyze previous years' papers to identify common patterns and frequently asked topics. Focus on mastering these areas to save time during exams.

4. Solve papers under exam conditions: Create a similar exam environment while practicing with previous years' papers. This will help you get used to the pressure and time constraints during the actual exam.

5. Review and analyze mistakes: After solving previous years' papers, thoroughly review your mistakes and understand the correct approach. This will help you avoid similar mistakes in the future and improve your problem-solving speed.

6. Seek guidance if needed: If you find any specific topics or questions challenging, seek guidance from teachers, tutors, or peers. Clarifying doubts can save time and enhance your problem-solving abilities.

Remember, consistent practice and focus are key to improving your problem-solving speed.