Here is a great video tutorial with tips to customise your presentations creating your own icons from clipart - from Bruce Gabrielle of Speaking PowerPoint - read an interview with Bruce here on the Indezine blog.

There is a great article in Forbes about storytelling through your speaking and covers five ideas for the content of your stories:

1. The quest
2. The stranger in a strange land
3. Rags to riches
4. The love story
5. The tale of revenge.

What type of stories do you use in your speeches?