These tips are all great. Thanks for the article.

My 2 cents from working over 5 years with NodeJS is to be careful when you sacrifice code readability over performance.

`.forEach`, `.map`, `.filter` are way more readable / maintainable than a 20 lines `for loop` with n+ var assignments.

As for `try..catch`, I use ( readability - again ) to follow a Promise chain.

    return new Promise( resolve => resolve( JSON.parse( req.body ) ) )
                  .then( body => db.update( body ) )
                  .catch( err => /* will catch JSON.parse as well as db.update */ )