Following the 80/20 on everything. You'll get 80% of your business from 20% of your customers, and you'll get 80% of all problems from 20% of your customers. Fi

Following the 80/20 on everything. You'll get 80% of your business from 20% of your customers, and you'll get 80% of all problems from 20% of your customers. Figure out who is in the 20% of problem customers who isn't in the 20% of profit customers, and fire them. Even better if you can refer them to your competitors.