Managing AWS costs can get tricky, but thankfully, AWS offers several tools to help you stay on budget. Start with AWS Cost Explorer — it gives you detailed insights into where your money’s going. Then, Trusted Advisor can recommend ways to save, like resizing underused instances. For predictable workloads, go with Reserved Instances or Savings Plans, which offer up to 70% discounts. Also, consider using Auto Scaling to automatically adjust resources based on demand — that alone can cut costs significantly. Monitoring storage in S3 and cleaning up unused snapshots also makes a big difference. Ultimately, staying proactive and regularly checking your usage reports helps prevent surprise bills at the end of the month.