Here's the checklist and a video explaining the basics.

A good project brief talks about these core 4 elements

1. The project
   - The type of person & the work
   - Time frame
   - Budget
2. Our business
   - About us
   - Our products/services
   - Current situation & goals
3. Our content
   - Asset list
   - Asset details
   - Design guidelines
4. Our tools
   - Tools we use
   - Technical & business requirements
   - Testing