Some of other general best practices are listed here:
- Resource costs differ across regions. Try using a region with lower costs.
- Enterprise agreements provide the best discounts. If you are not in an enterprise agreement, try to use one for the cost benefits.
- If Azure costs can be prepaid, then discounts for all kinds of subscription can be gained.
- Delete or remove unused resources. Figure out what resources are underutilized and reduce their SKU or size. If they are not needed, then delete them.
- Use Azure Advisor and take its recommendations seriously.