Recently I updated my laptop to Ubuntu 17.10 and here are some quick tips for UI that I found useful:

Display date on the clock, in addition to time:

>gsettings set org.gnome.desktop.interface clock-show-date true

Display seconds on the clock:

>gsettings set org.gnome.desktop.interface clock-show-seconds true

Display the ISO week date on the calendar:

>gsettings set org.gnome.desktop.calendar show-weekdate true

Display battery percentage in the status menu, in addition to the icon:

>gsettings set org.gnome.desktop.interface show-battery-percentage true