You can change your tone, volume, pitch, or speed of delivery. One can learn much from sermons written by different preachers, or written in different epochs. Don't look at their contents, but examine how they are structured. The Bible doesn't tell us how to conduct a service. Most services are conducted in accordance with tradition.
Few preachers use aids in their preaching.
However Jesus used things around him to teach. He used rocks, bread, water, and many other things. Aids can be visual and non-visual. Unconventional preaching is used to make your message be remembered, but it should not distract from your message. Its use is only limited by your imagination.