3. Label or identify each feature of the machine and / or step in the process
4. Direct the trainees’ attention to important aspects of the job. For example, if you’re training customer service representatives to handle incoming calls, first explain the different types of calls they will encounter and how to recognize them.
5. Provide head up preparatory information. For example, trainees learning to become first line supervisors’ often stressful conditions high workload and difficult subordinates back on the job. Studies suggest you can reduce the negative impact of such events by letting trainees know they might happen.
more at http://www.citeman.com/9072-training-learning-and-motivation.html#ixzz46f3QXILz