Integrate recognizable media into your lesson. In a classroom setting, media can be used under "Fair Use" law. For example, if you are teaching a lesson on video editing software, use a clip from a television show, sports event, or comedy act. For a photo editing course, use a movie poster or ask students to use the information in the lesson to create their own movie poster. Boring subjects will not keep your students' attention.
Create a competition. Individual competitions are good for small classes, while teams often suit large classes. Give rewards or points for completing certain tasks in the lesson quickly or precisely. Working toward one specific goal at a time demands more attention and learning than attempting to complete an entire lesson.
Build up with each lesson. Lesson two should incorporate ideas introduced in lesson one and so on. Repetition builds memory and allows students to become more familiar and comfortable with procedures.
Ask your students what would be more interesting. A short exit survey allows your students to give feedback on which lessons worked, which didn't, and what you could incorporate to make the course easier to understand and more exciting.