If you want to do something well, you need figures. Do your maths or set up a method to generate results. Then you'll be able to monitor of your decisions have positive or negative consequences.
Until you have data to guide your progress, chances are you'll navigate blind. It may work for a while, but soon the need for clarity will catch you.
Put figures into perspective, it might not be necessary to track closely the coffee consumption of your team... Focus on what really matters first to give yourself a reasonable opinion.