To mention just the first few that come to mind: - Setup aws billing cost alerts based on thresholds - Consult AWS billing dashboard daily first, then weekly,

To mention just the first few that come to mind: - Setup aws billing cost alerts based on thresholds - Consult AWS billing dashboard daily first, then weekly, then monthly. There is a "forecast" that can tell where you're going to land at the end of the month (ballpark). - Understand how s3 charges, take advantage of the various storage classes. Setup s3 bucket lifecycle to delete objects if you have expiring objects. - Make sure you setup backups. This can be a source-code repo or something like glacier. Make sure you understand how it works. tl;dr archiving is cheap, retrieving is expensive & slow. - Make sure you understand how data transfer is charged on AWS (e.g. https://aws.amazon.com/blogs/architecture/overview-of-data-transfer-costs-for-common-architectures/ https://aws.amazon.com/blogs/architecture/overview-of-data-t... - there are many others) - Avoid services that use the AWS API to fetch metrics unless you have bandwidth to monitor closely. I've seen companies getting charged 6-7k/month for months, without anyone noticing, just because a prom exporter was abusing the API. When I took notice, three months in, I removed the exporter without letting anyone know. Scream-test was passed in flying colours, no one complained :-) Good luck! :D