Based off Ryan Bates's dotfiles, but (almost) all configuration is my own.
Clone the repository and run the rake install task. It will prompt you before doing anything destructive.
git clone --recursive git://github.com/josh-/dotfiles ~/.dotfiles
cd ~/.dotfiles
rake install
I like to keep my dotfiles quite slim and under control - everything you see in each file was added manually by me after carefully considering its usefulness.
To remove the dotfile configs, run the following commands. Be certain to double check the contents of the files before removing so you don't lose anything unexpected.
unlink ~/.bin
unlink ~/.gitignore
unlink ~/.gemrc
unlink ~/.gvimrc
unlink ~/.irbrc
unlink ~/.vim
unlink ~/.vimrc
rm ~/.zshrc # careful here
rm ~/.gitconfig
rm -rf ~/.dotfiles
rm -rf ~/.oh-my-zsh
chsh -s /bin/bash # change back to Bash if you want