Mastering Vim

Powerline

Powerline provides an enhanced status line for Vim, as well as providing other functions, such as extending your shell prompt or tmux status line. It is available (along with detailed installation instructions) from https://github.com/powerline/powerline. When enabled in Vim, it looks something like this:

As you can see, it displays a plethora of information, including current mode, Git branch, filename, status of a current file, file type, encoding, and how far along you are in a current file. It's fully customizable, and lets you display as much or as little information as you want.

It's a bit of trouble to install, since it's ...