I've been running n8n for automated lead processing across multiple data sources. Here are 3 things that made a real difference: 1. Separate error handling workflows. Instead of try/catch in every node, I built a dedicated error handler sub-workflow that logs failures, classifies severity, and sends alerts. Cut my debugging time by about 60%. 2. Batch processing with throttle. When you're hitting APIs, n8n's batch processing with rate limiting is essential. Learned this the hard way after getting rate-limited by a CRM at 2 AM. 3. Data validation before enrichment. A simple schema check node before each enrichment step catches malformed data early rather than propagating bad data downstream. Would be curious what patterns others have found useful for keeping n8n production workflows reliable.