To ensure the success of microservices and serverless architecture, you should adopt some best practices and strategies. These include designing your services and functions with clear boundaries, responsibilities, and interfaces, following the principles of domain-driven design, loose coupling, high cohesion, and contract-first design. You should also apply the patterns and practices of cloud-native development, such as the twelve-factor app, the strangler pattern, the circuit breaker pattern, and the saga pattern. Additionally, you should use the appropriate tools and frameworks for developing, testing, deploying, and integrating your services and functions. This includes the serverless framework, the AWS SAM, the Azure Functions, and the Google Cloud Functions. It’s also important to implement DevOps culture and practices such as continuous integration, continuous delivery, continuous testing, and continuous monitoring. Furthermore, you should leverage observability and tracing capabilities of cloud platforms and tools like AWS X-Ray, Azure Application Insights, or Google Cloud Trace. Finally, evaluate and compare cloud platforms and providers based on your requirements to choose one that best suits your needs and goals. Consider adopting a multi-cloud or hybrid-cloud strategy to avoid vendor lock-in and increase portability and flexibility.