Do yourself a favor and take 5 minutes to go get the incredible Janus: Vim Distribution.
It's a quick and painless install.
From the Janus README:
$ brew install macvim (optional - requires Homebrew)
$ curl -Lo- https://bit.ly/janus-bootstrap | bash
The above two commands are all you need, that second command will also backup your existing Vim files in your home directory so you don't lose anything you may already have setup.
Customization is fairly simple using ~/.vimrc.before and ~/.vimrc.after files in your home dir.
The only changes I make to the base Janus setup is shown below, put these changes in ~/.vimrc.after if you like.
" Clear searches easily with ,/ after
nmap <silent> ,/ :nohlsearch<CR>
" Give a shortcut key to NERD Tree
map <F2> :NERDTreeToggle<CR>
" Disable F1 help crap, map to ESC instead
map <F1> <Esc>
imap <F1> <Esc>
One of my favorite commands once you have Janus installed is to reformat an entire file with a simple keystroke:
<leader>fefformats the entire file
Stop living in the dark ages, go install Janus right now!