Avoid/Minimize effort and problems with:

Provisioning servers, Deployment, Monitoring and Support

Recommendations:

Use Managed Services: No worry about managing servers, availability etc

Go serverless: Prefer Lambda to EC2!

Use Infrastructure As Code: Terraform, Pulumi, Cloud Formation

Implement CI/CD to find problems early: CodePipeline, CodeBuild, CodeDeploy

Perform frequent, small reversible changes

Recommended Approach:

Prepare for failure: Game days, Disaster recovery exercises

Operate: Gather Data and Metrics

CloudWatch (Logs agent), Config, Config Rules, CloudTrail, VPC Flow Logs and X-Ray (tracing)

Evolve: Get intelligence (Ex:Use Amazon Elasticsearch to analyze your logs) 

Prescribes operational practices and procedures used to manage production workloads.

This includes how planned changes are executed as well as responses to unexpected operational events.

Change execution and response should be automated.