How to properly install node.js and gulp.js on mac (latest osx)?

Question

Node.js

When I run npm install --global gulp, I get this:
Separatist:~ Simonz$ npm install --global gulp
npm ERR! tar.unpack untar error /Users/Simonz/.npm/gulp/3.8.11/package.tgz
npm ERR! Darwin 14.3.0
npm ERR! argv "node" "/usr/local/bin/npm" "install" "--global" "gulp"
npm ERR! node v0.12.2
npm ERR! npm v2.7.4
npm ERR! path /usr/local/lib/node_modules/gulp
npm ERR! code EACCES
npm ERR! errno -13
npm ERR! Error: EACCES, mkdir '/usr/local/lib/node_modules/gulp'
npm ERR! at Error (native)
npm ERR! { [Error: EACCES, mkdir '/usr/local/lib/node_modules/gulp']
npm ERR! errno: -13,
npm ERR! code: '
npm ERR! path: '/usr/local/lib/node_modules/gulp',
npm ERR! fstream_type: 'Directory',
npm ERR! fstream_path: '/usr/local/lib/node_modules/gulp',
npm ERR! fstream_class: 'DirWriter',
npm ERR! fstream_stack:
npm ERR! [ '/usr/local/lib/node_modules/npm/node_modules/fstream/lib/dir-writer.js:36:23',
npm ERR! '/usr/local/lib/node_modules/npm/node_modules/mkdirp/index.js:46:53',
npm ERR! 'FSReqWrap.oncomplete (fs.js:95:15)' ] }
npm ERR!
npm ERR! Please try running this command again as root/Administrator.
npm ERR! Please include the following file with any support request:
npm ERR! /Users/Simonz/npm-debug.log
Separatist:
What is the problem I do not understand, please tell me how to install it correctly.

Answer 1

Use sudo, Luke!

Answer 2

coolestguidesontheplanet.com/installing-node-js-on...