If you use a compiler do not ignor ever ever the warning messages. Aim, from day 1 to have a compilation warning free. Write code to be read by humans, and do n

If you use a compiler do not ignor ever ever the warning messages. Aim, from day 1 to have a compilation warning free. Write code to be read by humans, and do not ignore writing testing code, more or less you should have twice code in testing than real code under test.