title: Where to declare and initialize NSUserDefaults and the like?
body: <p>I'm writing my first Cocoa app.</p>
  
  <p>For now, every time I need the <code>NSUserDefaults</code>, I'm initialising an object of the class and use it in the local scope.</p>
  
  <p>This is a bit tedious. so I'm wondering where I should put the <code>NSUserDefaults</code> declaration and initialisation so that it might be available for all my <code>Application Delegate</code> methods?</p>