Resources
AWS documentation
AWS Best Practices for DDoS Resiliency (AWS Whitepapers)
Guidelines for implementing AWS WAF (AWS Whitepapers)
Other AWS resources
Analyzing AWS WAF Logs in Amazon CloudWatch Logs
(AWS blog post) Deploy a dashboard for AWS WAF with minimal effort
(AWS blog post) Security Automations for AWS WAF
(AWS Solutions Library) The three most important AWS WAF rate-based rules
(AWS blog post) Visualize AWS WAF logs with an Amazon CloudWatch dashboard
(AWS blog post)