I endeavour to cover the four "Cs" of Company, Category, Consumers, and Culture in most of my projects, particularly when my client is becoming acquainted with a brand through new business prospecting, or when they are running a competitive review. My projects for strategists tend to focus on consumers and culture.
For simplicity, the deliverables are in a text format, either in email or Word or pdf document, with links to external sources. Of course I can work with other formats e.g. PowerPoint if I'm to present directly to clients.