What is bad indicator? It is when you tell, let's measure customers' satisfaction in bank loan niche. You don't tell about what are you going to measure, how you are going to measure this, it's not a metric, but it's a good mission statement that tells about nothing.
What is great indicator or metric? It is the good metric (which we where talking above), but it is taken from some real-world business. So, it's not just your idea or ideas of some reported from business magazine, it's idea that works and it was checked by you. What you will need to do? You will need to pass it through you own business and optimize it to your business tasks. Work hard with business performance, and soon you will have a great business control tool.