Back in 1960, DR Seuss won a $50 bet he could write a book with under 50 words; it was published in August of that year.

If Theodor can do a solid sales job of enticing someone to eat Green Eggs and Ham, you can do the same with your next sales proposal.

The image shown below is an actual slide from a presentation. 

In case you need an idea, try the 10-20-30 PowerPoint proposal:
10 slides
20 minutes to present
30 Point for the smallest font.

Long presentations with someone reading off a screen?

I would not like them here or there.  
I would not like them anywhere.