callbackhell.js

var AwesomeObject = function() {
  this.init()
};

AwesomeObject.prototype = {
  
  init: function() {
    _.bindAll(this, 'onSuccess', 'onError', 'onComplete') 
    // or 
    this.onSuccess = $.proxy(this.onSuccess, this)
    this.onError = $.proxy(this.onError, this)
    this.onComplete = $.proxy(this.onComplete, this)
    // or 
    this.onSuccess = this.onSuccess.bind(this)
    this.onError = this.onError.bind(this)
    this.onComplete = this.onComplete.bind(this)
  },
  
  
  doSomeThingAsync: function() {

    return asyncThing({
      success: this.onSuccess,
      error: this.onError,
      complete: this.onComplete
    })
    
  },
  
  onSuccess: function() {
    this.happy();
  },
  
  onError: function() {
    this.sad();
  },
  
  onComplete: function() {
    this.whatever();
  },
  
  happy: function() { console.log('happy'); },
  sad: function() { console.log('sad'); },
  whatever: function() { console.log('whatever'); }
}

thanks :)