Syntax highlighting helps you manage code complexity.
The colors package (npm install colors) brings a similar benefit to your console output, making it easier to follow what is going on.
It is also one of the most used NPM packages.
It adds functions to the native JavaScript string so that you can do things such as "some string".red.
// Loading this module modifies String for the entire process
require('colors');
console.log('hello'.green); // outputs green text
console.log('world!'.red); // outputs red text
console.log('Feeling yellow'.yellow); // outputs yellow text
console.log('But you look blue'.blue); // outputs yellow text
console.log('This should cheer you up!'.rainbow); // rainbow