THE 80/20 RULE
The main idea is that 80% of something comes from 20% of something else. What does that mean? Well, it can mean a lot especially because the percentage ratio is situational but I'll simply it for you. 80% of your problems, come from 20% of the people in your life. if you're an artist or have a business (of any sort) 80% of your revenue come from 20% of your fans/clients. This does a couple things. The first is to make you take a step back every now and then and force yourself to remember this rule. The second is do pivot once you've broken it down.
This is important because it allows you to spend less time (or no time at all) with people that are problematic and it allows you to spend less money marketing a product, service or track to those who won't support you.