XFCE
Utilities
exo-open – Open URLs and launch preferred applications
https://linux.die.net/man/1/exo-open
Helper shortcuts
Settings app creates .desktop files in .local/share/xfce4/helpers
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Panel Clock
You can set the font size and color and stuff using this kind of line:
<span font="Arial 8" color="#FF0000">%d %B %Y%n%H:%M</span>
Reference: https://docs.xfce.org/xfce/xfce4-panel/clock
Sessions
Avoid saving sessions (annoying + leads to xfdesktop bugs)