An effective method of communicating is to get your CEO or corporate sponsor to create a short motivational video. A personal message from the CEO will encourage employees to take notice of the program and give it credibility.
Video is now easier to produce than ever before. You don't need an elaborate studio or production staff. Try to keep the video motivating so it isn't just a boring talking head. A little editing by adding graphs or pictures can add a lot to make it more interesting.