We recommend you go through our understanding the basics document and our user’s guide which will help you understand the basics and run the first scans.
Our HOWTO documents:
We’ve chosen the best videos about w3af for you to watch and learn about the framework.
Third-party HOWTOs and documents
Although we would like to have all HOWTO documents in our site, others have written excelent documents about w3af at third-party sites and we think you might find them interesting as well.