[joshclayton]

The screencast covers a lot of things, including workflow, key bindings, and tweaks to OS X to make you a faster developer. If you save ten minutes a day, you'll have made up the cost of the screencast in a day or two - which, in my opinion, is well worth it.

[judofyr]

Or you can buy the tmux book for $11 which tells pretty much the same: http://pragprog.com/book/bhtmux/tmux