Tips on how to write a clean and meaningful code

Tip: Names for variables and methods/functions
Tip: Comments may be misleading
Tip: Separate method/function for each task
Tip: Separate classes if possible
Tip: Don't repeat yourself
Tip: Handle the exceptions
Tip: As few arguments for functions as possible
Tip: Leave SOME whitespace

http://compiledk.blogspot.tw/2012/12/writing-clean-and-understandable-code.html