The number of customers you can effectively manage has a lot to do with the level of service your customers require.
When you analyze which aspects of your job consume the most time, the list is long; but servicing your customers is usually the most time consuming of all.
The way your competitors go to market and the way your salespeople respond to your competitors’ pricing tactics have a lot to do with both the sales and the gross margin your salespeople can achieve.
The classic professional manager is less and less willing to relocate when an owner or an industry recruiter comes calling.
Documentation is many times the difference between a highly-effective manager and one who struggles with accountability.