Here are a few best practices to follow when reviewing Appian code:

1. Use a code review tool: A code review tool can help you automate some of the review process, such as checking for coding standards or identifying potential issues. This can save time and help ensure that you don’t miss anything important.
2. Follow established coding standards: Make sure that the code being reviewed follows established coding standards, such as those outlined in the Appian Code Review Best Practices guide. This will help ensure that the code is easy to read and maintain.
3. Look for potential issues: Check for potential issues such as security vulnerabilities, performance issues, or bugs. If you find any issues, make sure to document them clearly and provide recommendations for how to address them.
4. Consider maintainability: Consider the maintainability of the code being reviewed. Is it easy to read and understand? Is it well-documented? Are there any areas where the code could be refactored to make it more maintainable?
5. Provide constructive feedback: Provide constructive feedback to the developer who wrote the code. Be specific about what you liked and what you would like to see improved, and provide suggestions for how to address any issues you have identified.