Worth re-reading every year, the good stuff is at http://cwe.mitre.org/top25/index.html http://cwe.mitre.org/top25/index.html (but don't read number 25 because

Worth re-reading every year, the good stuff is at http://cwe.mitre.org/top25/index.html http://cwe.mitre.org/top25/index.html (but don't read number 25 because it will get you riled up (their advice doesn't go anywhere near far enough))