If you are not a 'numbers person', hire one to be your #2 - then listen to them. 99% of all companies that fail were led by people that led with their gut, rather than by a clear understanding of their metrics and what they meant.
There are three parts to the metrics equation:
- Knowing which numbers are significant.
- Tracking and reviewing those numbers on a daily basis.
- Knowing how what you do impacts those numbers positively or negatively.
This is harder than it sounds. But, like any other behavior (positive or negative), it becomes habit with daily practice.