Here are some techniques you can use to debug errors caused by incorrect use of Excel functions:

Identifying the Error:

1. Error Codes: The first step is to identify the specific error code displayed in the cell. Common errors include #VALUE!, #NAME!, #REF!, #DIV/0!, and #N/A. Each code indicates a different type of issue with the function.
2. Formula Review: Carefully examine the formula itself. Look for typos in function names, cell references, or syntax errors like missing parentheses or commas.

Debugging Techniques:

1. F9 Key: Press F9 (with the formula selected) to evaluate the formula step-by-step. This helps pinpoint where the calculation goes wrong.
2. Evaluate Formula: Use the "Evaluate Formula" feature (Formula tab > Evaluate Formula) to break down the formula step by step and see the intermediate results.
3. Simplify the Formula: Try breaking down complex formulas into smaller, simpler steps. This can isolate where the error occurs.
4. Test with Known Values: Replace cell references with actual numbers to see if the function itself is working correctly.
5. Check Cell References: Ensure cell references are accurate and point to the intended cells. Double-check for typos or incorrect ranges.
6. Function Arguments: Verify that the number and type of arguments you're providing to the function are correct. Refer to function documentation for specific requirements.
7. Function Documentation: Use Excel's built-in help or online resources to understand the correct syntax and usage of the specific function you're using.
8. Online Forums: Search online forums and communities dedicated to Excel for help with specific errors or function troubleshooting tips.

Additional Tips:

- Autocorrect: Be aware that Excel's autocorrect feature might sometimes change function names or syntax unintentionally.
- Circular References: Circular references occur when a formula references its own cell, creating an infinite loop. Check for these by going to the Formulas tab > Error Checking > Circular References.
- Data Types: Ensure that the data types used in your formula are compatible with the function's requirements. For example, a function expecting numbers might not work with text values.

By following these techniques and paying attention to detail, you can effectively debug errors caused by incorrect use of Excel functions.