Node.js promise & ASync

• https://strongloop.com/strongblog/promises-in-node-js-with-q-an-alternative-to-callbacks
• http://www.willvillanueva.com/introducing-q-all-in-promises/
• http://howtonode.org/promises

When to use async functions

• http://www.sebastianseilund.com/nodejs-async-in-practice