Makre sure your home directory does not have a space in it or gcc will crap itself

1. Download and install Xcode
2. Install Command Line Tools (Xcode > Preference > Downloads)
3. Install Homebrew[http://mxcl.github.com/homebrew/]
4. Install Git
  $ brew install git
  $ cd
  $ git clone git://github.com/sstephenson/rbenv.git .rbenv
  $ echo 'export PATH="$HOME/.rbenv/bin:$PATH"' >> ~/.bash_login
  $ echo 'eval "$(rbenv init -)"' >> ~/.bash_login
5. Install ruby-build
  $ mkdir -p ~/.rbenv/plugins
  $ cd ~/.rbenv/plugins
  $ git clone git://github.com/sstephenson/ruby-build.git
6. Install Ruby 1.9.3
  $ rbenv install 1.9.3-p392
7. Set 1.9.3 as global
  $ rbenv global 1.9.3-p392
  $ rbenv shell 1.9.3-p392
8. Update to latest rubygems version
  $ gem update --system
9. Install rdoc
  $ sudo gem install rdoc
10. Install rails
  $ sudo gem install rails
11. Install bundler
  $ sudo gem install bundler
12. Install postgres
  $ sudo gem install pg
13. Install Heroku toolbelt
  $ brew install heroku-toolbelt
14. Install Quartz[http://xquartz.macosforge.org/downloads/SL/XQuartz-2.7.4.dmg]
15. Install MongoDB
  $ brew install mongodb
  $ mkdir -p ~/Library/LaunchAgents
  $ cp /usr/local/Cellar/mongodb/2.2.2-x86_64/homebrew.mxcl.mongodb.plist ~/Library/LaunchAgents/
  $ launchctl load -w ~/Library/LaunchAgents/homebrew.mxcl.mongodb.plist
16. Install imagemagick
  $ brew install imagemagick
17. Install POW
  $ curl get.pow.cx | sh
  $ cd ~/.pow
  $ ln -s ~/Sites/storyberg
  
  If POW loads the wrong ruby version you might have to add the following to ~/.powconfig
  export PATH="/usr/local/Cellar/rbenv/0.3.0/bin:/Users/micdijkstra/.rbenv/shims:/Users/micdijkstra/.rbenv/bin:$PATH"