My personal gruntfile

gruntfile.js

module.exports = function(grunt) {

	grunt.initConfig({

		pkg: grunt.file.readJSON('package.json'),

		sass: {
			dev: {
				options: {
					style: 'expanded'
				},
				src: ['scss/style.scss'],
    			dest: 'style.css'
			},
			prod: {
				options: {
					style: 'compressed'
				},
				src: ['scss/style.scss'],
    			dest: 'style.css'
			}
		},

		htmlmin: {
			prod: {
				options: {
					removeComments: true,
					collapseWhitespace: true,
					removeEmptyAttributes: true,
					removeCommentsFromCDATA: true,
					removeRedundantAttributes: true,
					collapseBooleanAttributes: true
				},
				files: {
					'./index-min.html': './index.html'
				}
			}
		},

		watch: {
			css: {
				files: ['**/*.scss'],
        		tasks: ['development'],
				options: {
					livereload: true
				},
			},
		}

	});

	// Load NPM's via matchdep
	require('matchdep').filterDev('grunt-*').forEach(grunt.loadNpmTasks);

	// Development task
 	grunt.registerTask('development', ['sass:dev']);

 	// Distrubution Task
 	grunt.registerTask('production', ['sass:prod', 'htmlmin:prod']);
}

package.json

{
  "name": "grunttest",
  "version": "0.0.1",
  "devDependencies": {
    "grunt": "~0.4.1",
    "grunt-contrib-watch": "~0.4.3",
    "grunt-contrib-uglify": "~0.2.5",
    "grunt-contrib-sass": "~0.5.0",
    "matchdep": "~0.1.2",
    "grunt-contrib-htmlmin": "~0.1.3"
  }
}