debouncing save

app.js

var TodoItem = Backbone.Model.extend({
  initialize: function(){
    this.save = _.debounce(this.save, 500);
  },

  toggleStatus: function(){
    if(this.get('status') == 'incomplete'){
      this.set({'status': 'complete'});
    }else{
      this.set({'status': 'incomplete'});
    }

    this.save();
  }
});