It's great if you can share whatever wisdom you consider "hard to get on your own" about the development procedures (unit and integration testing, linting/hint-ing) with these particular technologies.
If you are willing to go into some details about important topics such as deployment and scaling strategies, this will be cool as well.
What front-end frameworks do you use for your web applications using your Node backend (AngularJS, Ember.JS etc)?
Links to other resources are also great.
Thanks for taking the time to share your mastery. I hope this will turn into a great online resource for devs just starting to use NodeJS & MongoDB.