Whitespace
Enable and customize guide-key mode
Shows possible keybindings after pressing a prefix key. For example,
after pressing C-x 4, it will show all the next possibilities, like f,
which will find a file in other window C-x 4 f.
Enable and diminish view-mode for read-only buffers
Open files read-only by default in dired
Improvements managing buffers in other windows

* Set default help behaviour as in XEmacs
* Simplified shortcut for kill-buffer-and-other-window
Kill buffer without asking when using C-k

I'm still not sure if I like it or not... Time will tell.
Disable global visual line mode

It is a good idea, but it keeps in my way when editing buffers expecting
to show long lines truncated, like package-list.

Maybe a better solution would be to add these as exceptions, but this is
fine for now.
Remove leftover customization from theme
Use small fringes, they are too wide by default
Disable scrollbar

I am getting used to read the percent in the modeline. I never liked it
because the height of the scrollbar handle varies depending on the
amount of characters shown, not depending on the number of lines shown.

I already do most of movements through the buffer through the keyboard anyway.