You can also put window configurations into registers. C-x r w r puts your current window configuration (what windows you have open, their sizes and the positio

You can also put window configurations into registers. C-x r w r puts your current window configuration (what windows you have open, their sizes and the positions in their buffers) into register r and C-x r j r jumps to that configuration. I personally find this extremely useful--I use it far more than any other register-based feature. Of course I effectively use Emacs as my window manager for everything except web browsing, ergo I am certifiably insane. And if ezbl or a similar project ever matures, I might start browsing from Emacs too :P.