Give them a chance to evaluate their performance, give them a chance to show there efficiency to reach the target. Ask them about their requirements that may bring positive results for the objectives of the company and for individuals as well.
Never ever use the threat tools during the assignment because they will not be able to work under pressure, they will not be able to concentrate on their work and their focus will be diversified.
There must be a training section for them in a calm and peaceful atmosphere. The topic of motivating is very much important nowadays because the progress of any company depends on the quality of work performed by its employees and employees' efficiency depend on their level of motivate.