Wow Windmove is a little gem that I'd never heard of. Shift-<arrow> is way more intuitive for me for moving around buffers than bashing C-x o or invoking ace window and then choosing a buffer number. Activate with

  (when (fboundp 'windmove-default-keybindings)
    (windmove-default-keybindings))

Brilliant, discovering things that you didn't know you needed that are already there in Emacs is a joy. Like getting a hug from the hackers[0] who went before.

[0] in the early MIT sense.