12 programming mistakes to avoid

Programming mistake No. 1: Playing it fast and loose
Programming mistake No. 2: Overcommitting to details
Programming mistake No. 3: Not simplifying control
Programming mistake No. 4: Delegating too much to frameworks
Programming mistake No. 5: Trusting the client
Programming mistake No. 6: Not trusting the client enough
Programming mistake No. 7: Relying too heavily on magic boxes
Programming mistake No. 8: Reinventing the wheel
Programming mistake No. 9: Opening up too much to the user
Programming mistake No. 10: Overdetermining the user experience
Programming mistake No. 11: Closing the source
Programming mistake No. 12: Assuming openness is a cure-all

http://www.dzone.com/links/r/12_programming_mistakes_to_avoid.html