Seven in 10 workers say their firms have undergone major reorganizations in the last five years -- and their senior managers say the changes have meant challenges to morale, productivity, customer service, and profit. But the negatives can be offset by a good change-management strategy, shows a recent Gallup Organization poll conducted for marketing consultants Carlson Marketing Group. Three out of four senior-management respondents say such a strategy using key best practices had a positive effect on employee morale; 59% say it increased productivity; 50% say it increased profitability; and 72% think it increased their firm's ability to provide quality customer service. Five key best practices identified by Carlson: