Use Gulp or Grunt for creating automated tasks. Gulp leans to code over configuration while Grunt leans to configuration over code. I personally prefer Gulp as I feel it is easier to read and write, but both are excellent.
Learn more about gulp and patterns for task automation in my Gulp Pluralsight course
Use task automation to list module definition files *.module.js before all other application JavaScript files.
Why?: Angular needs the module definitions to be registered before they are used.
Why?: Naming modules with a specific pattern such as *.module.js makes it easy to grab them with a glob and list them first.
var clientApp = './src/client/app/';
// Always grab module files first
var files = [
clientApp + '**/*.module.js',
clientApp + '**/*.js'
];