Wage/Hour Laws
This is a high exposure area and applies even if you have only one employee. The usual pitfalls are: Not paying employees on payday; Not paying employees overtime; misclassifying employees as independent contractors; hiring temps and part timers; Not paying for required getting ready for and ending work time such as putting on/off uniforms or starting your IT; employees doing work while on vacation; reimbursement for work related expenses.
Courts have upheld written agreements with and signed by employees that specify work related terms and conditions.