These are popular answers about business rules:

Getting Started:

• Overview of business rule functionality
• Best practices for setting up incident rules
• Blog: Business Rules and SLAs

Enhanced Business Rules

• Enhanced Business Rules object availability
• Best Practices for Enhanced Business Rules
• Enhanced Business Rule deployments
• "Custom Object Rules are being updated to Enhanced Business Rules" message

Configuration Options:

• Fields that can be used in IF conditions for rules
• Actions a business rule can execute
• Configuring a rule that sends a standard response to the customer

Routing Rules:

• Routing incidents to staff members based on queues
• Routing chat requests to agents

Escalation Rules:

• Setting up escalation rules
• Using Response Interval, Revalidate, and Recalculate boxes with rules   

Troubleshooting:

• Testing business rule configurations
• Accessing the "Rule Runtime Log" for Enhanced Business Rules in Browser UI
• Using the Rule Log to troubleshoot rules (Legacy Rules)
• Rules are not acting on updated records
• Changes to an incident or record are not getting saved
• Our new rule is not working correctly
• 'Send Receipt Email' incident rule action is designed for incident create only
• Chats are not showing in the Rule Runtime Log

Additional Information:

• Abandon and Restore options in Rules
• Dependency conflicts when editing products, staff, custom fields, or queues
• Activating rules gives message about records with null state
• Processing order of rules, external events and custom processes