My basic modular pattern for javascript files

module_start.js

var Module = (function(document, window, $){

  var self = {},
    // DOM/jQuery
    $document = $(document),
    $window = $(window),


    // flags

    // private functions
    bindEvents,
    assignDomVariables;


  bindEvents = function(){
    $document.on( 'ready page:change', assignDomVariables );

    $document.on( 'ready page:change', function(){

    });

    $document.on( 'page:receive', self.destroy );
  };

  // assign DOM-dependent variables
  assignDomVariables = function(){

  };


  // module settings
  self.settings = {

  };

  self.init = function( settings ){
    if ( settings ) {
      $.extend( {}, self.settings, settings );
    }

    bindEvents();
  };

  self.destroy = function(){
    $window.off('.module');
  };

  return self;

})(document, window, jQuery);