Miscellaneous files for https://en.wikipedia.org/wiki/Getting_Things_Done (GTD) and https://en.wikipedia.org/wiki/Pomodoro_Technique .
See this image.
See this PDF for labels on physical post boxes.
A command-line timer for Pomodoro can be made by adding to ~/.bash_aliases
the
line
alias pomodoro='sleep 1500 && mplayer -loop 3 /usr/share/sounds/speech-dispatcher/test.wav > /dev/null 2>&1'