Do you brew coffee? Weigh your beans, don't scoop. (You can weigh your water too! 1g of water=1 ml; makes it super easy to adjust your ratio of bean:water)
Do you wanna bake? Weigh your ingredients! It makes the process faster and more accurate. Most cookbooks do this for baking these days, it rules.
Do you wanna bake bread? Maybe a full loaf is too much for you/your household (or not enough?) Learn baker's percentages and you're unstoppable; bread becomes infinitely scalable (haha see what I did there)
scales rock, buy one for your kitchen today. (I recommend escali; their basic model has lasted perfectly under daily use for soseven years now)