Example Gruntfile showing concurrent CoffeeScript > JS > minification, SASS > CSS > minification, livereload, and nodemon / nodeinspector tandem.

Gruntfile.coffee

module.exports = (grunt) ->
	config = 
		browserify:
			development:
				options:
					transform: ["coffeeify"]
					debug: true
				files:
					"./public/scripts/editor.js": ["./frontend/scripts/editor.coffee"]
		uglify:
			production:
				expand: true
				src: ["./public/**/*.js", "!./public/**/*.min.js", "!./public/**/jquery*.js"]
				ext: ".min.js"
		sass:
			development:
				options:
					sourcemap: true
					trace: true
					style: "expanded"
				files:
					"./public/styles/main.css": "./frontend/sass/main.scss"
			production:
				options:
					sourcemap: false
					trace: false
					style: "compressed"
				files:
					"./public/styles/main.min.css": "./frontend/sass/main.scss"
		# csscss:
		# 	development:
		# 		src: ["./public/**/*.min.css"]
		cssmin:
			production:
				# options:
				# 	report: "gzip"
				expand: true
				src: ["./public/**/*.css", "!./public/**/*.min.css"]
				ext: ".min.css"
		csso:
			production:
				# options:
				# 	report: "gzip"
				expand: true
				src: ["./public/**/*.css", "!./public/**/*.min.css"]
				ext: ".o.min.css"
		nodemon:
			web:
				options:
					file: "web.coffee"
					env:
						NODE_ENV: "development"
			debug:
				options:
					file: "web.coffee"
					nodeArgs: ["--debug"]
					env:
						NODE_ENV: "development"
			production:
				options:
					file: "web.coffee"
					env:
						NODE_ENV: "production"
		"node-inspector":
			development: {}
		watch:
			scripts:
				options:
					atBegin: true
					spawn: true
				files: ["./frontend/scripts/**/*.coffee", "./frontend/scripts/**/*.js", "./shared/src/**/*.coffee", "./shared/src/**/*.js"]
				tasks: ["browserify:development", "uglify:production"]
			styles:
				options:
					atBegin: true
					spawn: true
				files: ["./frontend/sass/**/*.scss"]
				tasks: ["sass:development", "sass:production", "concurrent:cssmin"]
			livereload:
				options:
					livereload: true
					spawn: true
				files: ["./frontend/**/*.ractive", "./shared/**/*.ractive", "./public/**/*",  "!./public/**/*.min.js", "!./public/**/*.min.css"]
		concurrent:
			cssmin:
				tasks: ["cssmin:production", "csso:production"]
				options:
					logConcurrentOutput: true
			process:
				tasks: ["watch:styles", "watch:scripts"]
				options:
					logConcurrentOutput: true
			web:
				tasks: ["nodemon:web", "watch:livereload"]
				options:
					logConcurrentOutput: true
			debug:
				tasks: ["node-inspector", "nodemon:debug", "watch:livereload"]
				options:
					logConcurrentOutput: true
			all:
				tasks: ["concurrent:process", "concurrent:web"]
				options:
					logConcurrentOutput: true



	grunt.initConfig config	

	grunt.loadNpmTasks "grunt-contrib-watch"
	grunt.loadNpmTasks "grunt-concurrent"

	grunt.loadNpmTasks "grunt-node-inspector"
	grunt.loadNpmTasks "grunt-nodemon"

	grunt.loadNpmTasks "grunt-contrib-coffee"
	grunt.loadNpmTasks "grunt-browserify"
	grunt.loadNpmTasks "grunt-contrib-uglify"

	grunt.loadNpmTasks "grunt-contrib-sass"
	grunt.loadNpmTasks "grunt-csscss"
	grunt.loadNpmTasks "grunt-contrib-cssmin"
	grunt.loadNpmTasks "grunt-csso"

	grunt.registerTask "default", "User options", ->
		grunt.log.writeln """
			Grunt Commands:
				grunt all
					grunt concurrent:process
					grunt concurrent:web
				grunt process
					grunt watch:scripts
					grunt watch:styles
				grunt web
					grunt nodemon:web
					grunt watch:livereload
				grunt debug
					grunt node-inspector
					grunt nodemon:debug
					grunt watch:livereload
			"""

	grunt.registerTask "debug", ["concurrent:debug"]
	grunt.registerTask "web", ["concurrent:web"]
	grunt.registerTask "process", ["concurrent:process"]
	grunt.registerTask "all", ["concurrent:all"]