Calculate the 20% Saturation RuleAs a general rule, they own 20% of their market. They are the leading authority within their market. Use a tool to identify the size of the industry niche (for example InfoUsa.com). Multiply that number by 20%. If the number falls between 1,000 and 10,000 you are in a specialized niche. An industry that calculates under 1,000 is likely too small and not an ideal niche.*Content drafted from SURGE, written by Mike Michalowicz