Reward properly. This means both rewarding the right people and rewarding them appropriately (no big reward for a small accomplish). This includes verbal praise as well as tangible rewards such as raises and bonuses. Nothing disrupts the smooth operation and effectiveness of a workplace more than the best workers not getting the recognition/rewards they deserve. Therefore you need to be aware not only of the actual performance of your staff, but their perceptions of who are the best workers. Then you need to take steps to ensure that their perceptions coincide with your employees' actual performance by communicating what you value.