If you are aware of where your future students are coming from, research on your part is paramount. In the event that all the students are from the same company or religious organization, utilize whatever material you can find in the target language that will promote language improvement. Again, this is the motivational factor that Shelley is talking about.
For example, I was teaching an outside adult Spanish course for a summer and my university did not tell me anything about the students. Ages varied tremendously: 19-69. At first, the students were reluctant to learn as much as possible, as they felt like they had to be there, but once I found out that they were all there because of their church was sending them all as missionaries to Latin America, I taught them the Lord's Prayer and I have never seen such a more intense lesson. After that little bit of knowledge, I had them hooked for life. Every student automatically transformed into an A-student.
Likewise, if your students are all coming from a single company, look at the company's home page in addition to their competitors. Compare and contrast, explaining to them where profit and promotion lie and they will love you forever.
For further advice, feel free to visit me working on-line.
Eric Paul Monroehttp://www.eric-tesol.com/