By Cindy Waxer. Most small businesses understand the value of smart payroll practices. But many fail to anticipate the negative impact of this business-critical activity if poorly executed. While a solid payroll system can keep employees happy and the government satisfied, poor payroll practices can create tax-related nightmares, send labor costs skyrocketing, and prompt an employee exodus. Fortunately, small businesses need not invest millions in high-end software programs or...