Visit the AWS Architecture Centre - more here
See the latest reference architectures.
You can download the GitHub Reference architectures with the CloudFormation templates with enterprise scale templates.
Use the Wizard (questions) tool to review your workload in your VPC to ensure you follow the industry best practices
Rule of thumb: Be a pessimist when designing architectures in the cloud; assume things will fail. In other words, always design, implement and deploy for automated recovery (Fault Tollerance) from failure. See: https://media.amazonwebservices.com/AWS_Cloud_Best_Practices.pdf
Do the training ~1 Hr
Meet Compliance Standards - see more here. You are responsible to ensure compliance to gain certification for your business.
https://aws.amazon.com/compliance/shared-responsibility-model/