Singleton pattern

Singletons : One Object, Global Access

Basically, you make the class initialize a class variable (once) and then call that. You nuke the new method (so you can't initialize the class) and that's that. Use the Singleston module to do the heavy lifting

require 'singleton'

class MyLogger
  include 'singleton'

end

Can lead to coupling (everything has access to the global singleton)