1. Debugging Tools: Make use of debugging tools provided by the Integrated Development Environment (IDE) such as Visual Studio. These tools allow you to set breakpoints, step through code line by line, and inspect variables at runtime.

2. Console Output: Use statements like Console.WriteLine() to print out the values of variables at different points in the code. This can help you identify issues with variable assignments or incorrect calculations.

3. Commented Code: Comment out sections of code that may be causing errors and see if the problem persists. By slowly removing sections of code, you can narrow down the cause of the error.

4. Divide and Conquer: If you have a large block of code that is causing errors, try to isolate the problem by removing sections of code until you find the specific part that is causing the error.

5. Test Input: Make sure to test your code with different input values, including edge cases and invalid inputs. This can help you identify issues with variable boundaries or missing error handling.

6. Code Review: Have a colleague or friend review your code. Sometimes a fresh pair of eyes can spot mistakes or offer suggestions for improvement.

7. Logging: Use logging frameworks like log4net or NLog to record information, warnings, and errors during program execution. This can help you track down issues and provide valuable insights into the state of your program.

8. Stack Traces: When an exception is thrown, review the stack trace to identify the exact line of code that caused the error. This can help you pinpoint the problem area and fix it quickly.

9. Read Documentation: If you are using a library or framework, make sure to thoroughly read the documentation to understand the correct usage and potential pitfalls. This can save you from unnecessary debugging efforts.

10. Rubber Duck Debugging: Explain your code line by line to a rubber duck or an inanimate object. This technique helps you think through your code logically and often leads to finding the source of the problem.

Remember, debugging is a skill that takes time to develop. With practice and experience, you will become more proficient at identifying and fixing issues in your code.