As an AWS user, there are several tools and techniques you can use to ensure that you are not paying more than you should be. Here are some of the best practices:

• AWS Cost Explorer: AWS Cost Explorer is a free tool that allows you to analyze and visualize your AWS costs and usage. It provides you with a detailed breakdown of your costs by service, region, and time period. You can use it to identify areas where you are spending more than you should be and take corrective actions.
• AWS Trusted Advisor: AWS Trusted Advisor is a tool that provides you with personalized recommendations to optimize your AWS infrastructure. It covers areas such as cost optimization, performance, security, and fault tolerance. It can help you identify cost-saving opportunities and take corrective actions to optimize your resources.
• AWS Budgets: AWS Budgets is a tool that allows you to set custom cost and usage budgets for your AWS resources. It sends you alerts when you exceed your budget thresholds, helping you to take corrective actions before you incur unnecessary costs.
• AWS Cost Anomaly Detection: AWS Cost Anomaly Detection is a machine learning-powered tool that identifies anomalous spending patterns in your AWS account. It uses AI to analyze your usage patterns and notify you of any unusual spending behavior. You can then investigate the anomalies and take corrective actions.
• Right-sizing: Right-sizing is the process of adjusting your AWS resources to match your workload requirements. By optimizing your resource allocation, you can avoid paying for unused or underutilized resources. AWS offers tools like AWS Compute Optimizer and AWS Instance Scheduler that can help you optimize your resource usage and reduce costs.