Let me share with you some tips from sermon to powerpoint. First, you have to know what it is that you want to accomplish with the sermon, and in general how to touch your audience. The first part of sermon writing and making a visual presentation is to know your audience. They teach us that in seminary, and you've heard it said: "have in one hand the Bible and one hand the newspaper."
I'd like to change that cliché a bit to say - have in one part of your mind the scripture and it's exegesis, and in the other part of your mind be interacting with a real person in your congregation! One way to interact is online - i.e. put out questions to people about what's going on in their lives, read their blogs, wonder out loud on Facebook, comment on their notes & stories and see what makes them tick.
What are the questions being asked in films your people (not someone else's people) are watching? What makes the movie appealing to them? What runs their life - is it work, their family, sports, music, a certain relationship? In other words, be curious about what kind of life your people are facing.
I live in a semi-urban/suburban environment. We have a wide range of cultures represented, but there are lines of commonality - largely because of the corporate workplace most are a part of in this place. This has been "ah, duh" moment for me in the past year - realizing that people are affected so much by the mentality of work here. The sermons I have preached that were most appreciated lately have been ones that pull in the corporate environment with faith in mind. I am a student continually of the people I love here.
Once you have that context, begin the sermon preparation. How does this scripture talk to their daily life? How does it pull them from daily life to a life beyond ordinary with God? And, how will you graphically represent that movement?
Tell the Story Well. The "story board" is a sequence of events that move with the plot of your sermon. It starts somewhere, has a middle, and ends somewhere new. If they're in the corporate mindset, I'll need to draw the story lines from cold, corporate culture into the heart of God.
I have to do that by telling a story - seeing the plot, the feeling to communicate, describing the characters (biblical and in real life today), linking to a real life situation, and knowing where the "ah-hah" moment should be. The job of visual communication is to tell that story in pictures.
The slide presentation could become a "document" - i.e. used to print out the scripture and emphasize words - rather than tell the story with background and images. In the book, slide:ologoy: The Art and Science of Creating, author Nancy Duarte says this, "So, before your next presentation, assess how you've used the application. Did you create a document or a presentation?" Slides are often an after-thought - i.e. because we're "supposed" to have it - rather than a moving, visual act of communicating what you're feeling and telling about Jesus.
When you get to that "ah-hah" moment what will move the audience? Will it be a dark, blank slide with the focus on your words or will it be a picture that describes the feeling well or will it be one word?