I was doing this research project where I was tallying the frequency of multiple things (too many for a smartphone counter app to handle), and the only way I could think of doing it reliably and repetitively was to use the ctrl-a and ctrl-z commands in vim to increment numbers written next to labels for each thing I wanted to track. iirc you only need to be on the same line as the number you want to increment when entering the command (if there's only one number per line), making it really easy with minimal fuss. lifesaver