Color can help humans pick out useful information in a sea of output. Adding color to your shell scripts portably is actually pretty easy.
Many tools will measure how long it takes for a computer to do something. Stopwatch.sh is one I keep up my sleeve for when none of those other tools fit.
I maintain separate personal and work accounts for as much as I can. Heavyweight solutions have infuriating flaws, so why not try a simple shell script?