Mejorando la performance de ASP.NET

A continuación dejo el link de una muy buena nota que da 7 tips de como mejorar la performance de tu portal en ASP.Net 3.5:

TIPS:
Performance Improvement #1: Make it AJAX
Performance Improvement #2: Remove burden from client side
Performance Improvement #3: Initialize Workflow Runtime Engine Once and then Reuse It
Performance Improvement #4: Server-side Multithreading.
Performance Improvement #5: Cache the result
Performance Improvement #6: Client side validation
Performance Improvement #7: Cache on the client side

NOTA: 7 ways to do Performance Optimization of an ASP.NET 3.5 Web 2.0 portal