To create a macro:

C-x (

Once in macro recording mode, enter a series of commands. When finished:

C-x )

To name the most recently recorded macro:

M-x name-last-kbd-macro

Enter a name for the macro. The name will now be accessible as M-x <name>.

To generate macro elisp suitable for reload, run M-x insert-kbd-macro and enter the name of a defined macro. Paste the resulting code into ~/.emacs.

By default, the emacs buffer list appears in a vertical split when you type C-x C-b (or run M-x list-buffers). I use a widescreen monitor which means a horizontal split would be much nicer. Since I couldn't find a Customize setting to change this behavior, I wrote this keyboard macro in my ~/.emacs which does the trick:

(fset 'my-list-buffers
   [?\C-x ?1 ?\C-x ?3 ?\M-x ?l ?i ?s ?t ?- ?b ?u ?f ?f ?e ?r ?s return ?\C-x ?o])

(global-set-key "\C-x\C-b" 'my-list-buffers)