As seen in the Wall Street Journal The Experts (Dr Sullivan is a member of the panel of experts).
Retaining every employee is critical to a small business, because with a low number of employees, losing even one has an impact that even your customers will notice.
Because it is difficult to find talented replacements, managers should instead focus on preventative retention actions. Fortunately, because managers usually know what motivates their employees, the key success factor is simply having sufficient time to work with an employee who has just started thinking about leaving.