First, backup your existing .vim directory and configuration files:
mv ~/.vim ~/.vim-backup
mv ~/.vimrc ~/.vimrc-backup
mv ~/.gvimrc ~/.gvimrc-backup
Then clone this repository:
git clone git://github.com/matflores/vimfiles.git ~/.vim
Finally, create links to the new configuration files:
ln -s ~/.vim/vimrc ~/.vimrc
ln -s ~/.vim/gvimrc ~/.gvimrc
Most of this work is heavily based on Michael Sander's vim-files. Most snippets were copied from Scrooloose's snipmate-snippets project.