The tmux integration is amazing too! When I ssh into a server, whatever window/pane setup I last had (tab colors, names, and all), are restored.
On one server I run a few 'production' apps, but I also have a tab for 'random shit' and a tab for 'nginx config'. the production tabs are bright red, and are usuall split pane with the left showing logs, and the right giving me a terminal with app-specific commands (and in the current app home dir).
But then on another server I have two separate windows, and each window deals with one of the two 'concerns' on that server.
It's a massive help in managing all my panes/sessions.