Tips from The Practice of Programming by Kerninghan and Pike
- Look for familiar pattern
- Examine the most recent changes
- Don’t make the same mistake twice
- Debug it now, not later
- Get a stack trace
- Read before typing
- Explain your code to someone else
- Make the bug reproducible
- Divide and conquer
- Study the numerology of failures
- Display output to localize your search
- Write self-checking code
- Write a log file
- Draw a picture
- Use tools
- Keep records
SKB 
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