You can't manage what you don't measure, and you can't improve what you don't manage.
出自汉·桓宽《盐铁论·地广》。释义:不因为生活的贫困而改变自己的节操,不因为地位的低贱而变更自己的志向。
The best way of learning about anything is by doing.
The best businesses solve real problems for real people.