finally understand gist

server.js

// Call the requirements
var express = require('express');
var app = express();
var bodyParser = require('body-parser');
var morgan = require('morgan');
var mongoose = require('mongoose');
var port = process.env.PORT || 8080;
//var User = require('./model/Users');

Q = require("q");

example = function(promise){
  var deferred = Q.defer();

  var valve = true;
    if (valve == true){
        console.log("first one");
        var value = {Value: "im a value"};
        deferred.resolve(value);
    }else{
        console.log("Error");
        deferred.reject();
    }
    return deferred.promise;
};

example2 = function(promise){
    //example promises best practice
    var deferred = Q.defer();
    var value = promise;
    console.log("Second Promise: "+promise);
    var valve = true;
    if (valve == true){
        value.awesome = "Cool";
        deferred.resolve(value);
    }else{
        console.log("Error");
        deferred.reject();
    }
    return deferred.promise;
};

example3 = function(promise){
    //example promises best practice
    var deferred = Q.defer();
    var value = promise;
    console.log("Third Promise: "+promise);
    var valve = true;
    if (valve == true){
        value.new = "cools"
        deferred.resolve(value);
    }else{
        console.log("Error");
        deferred.reject();
    }
    return deferred.promise;
};

example().then(example2).then(example3).done(function(promise){
    console.log(promise.new);
    console.log("Finished");
});

app.listen(port);