Discussion on: Addy Osmani's 18-Point Web Performance Checklist

Some additional things to not do...

• Don't include 20 different user tracking scripts.
• Don't ignore performance.
• Don't use the default web server configurations.
• Don't use video backgrounds.
• Don't load the page and then make a dozen ajax calls for content.
• Don't use assets from third parties.
• Don't rely on cookies.
• Don't try to figure out my location.
• Don't try to track every mouse click, scroll or movement.
• Don't have long timeouts.
• Don't cheap on hosting.
• Don't forget to test usability under load.
• Don't forget to test usability across multiple browsers/os.
• Don't forget to enable TLS.
• Don't include 20 different user tracking scripts.