This document provides tips for improving ASP.NET performance, including: 1. Avoiding exceptions by using TryParse methods and subscribing to first chance exceptions to find hidden exceptions. 2. Understanding how requests are serialized and deserialized to optimize payload size and customize JSON serializers. 3. Offloading SSL processing to load balancers to reduce overhead on the web server. 4. Optimizing garbage collection by avoiding large object heaps, using streams, and monitoring performance counters. 5. Going beyond SQL reports to understand real-world database performance using logging and monitoring tools.