Finally, as you start doing more things regularly, start making more aliases for them. History | uniq -c | sort -n periodically will tell you what you should make a short, memorable aliases for.
Cage is a Wayland kiosk tool - it runs one program full screen, the -s option lets you switch away or back via c-a-Fn#. The only thing I think I'm missing here is something that automounts/ejects USB drives under ~/mnt, which I believe is possible in console-land but haven't figured out.