Idea for listening to objects in a view, runs after `initialize` so you can add custom vent objects too.

listeners-demo.js

var MyView = Marionette.ItemView.extend({

  listeners: {
    model: {
      'add': 'modelAdd'
    },
    collection: {
      'reset': 'reset'
    },
    appVent: {
      'iloveevents': 'unicorns'
    }
  },

  initialize: function(options) {
    this.appVent = options.appVent;
  }

});

listeners.js

_.extend(Marionette.ItemView.prototype, {

  _bindListeners: function() {
      if (!this.listeners) { return; }

      _.each(this.listeners, function(events, objectKey) {
        if (!this[objectKey]) {
          throw 'The view doesn\'t have an object named this.' + objectKey;
        }

        _.each(events, function(method, eventName) {
          if (!this[method]) {
            throw 'The view doesn\'t have a this.' + method + ' method';
          }

          this.listenTo(this[objectKey], eventName, this[method]);
        }, this);
      }, this);
    }
  
});