IE hacks and conditionals:

.color {color: #777;} /* for all browsers *
* html .color {color: #C39;} /* for IE6 */
*+html .color {color: #66F;} /* for IE7 */
.color {color: #0FC\0/;} /* for IE8, going last */

More conditional comments inline text

CSS

   <style> 
    <!--
	p { color:#009900; 
	font-family:"comic sans ms",sans-serif; }
	h1 { color:#660000; font-size:12pt; }
    -->
   </style>

HTML

Strange character list

Scripts

Media

Speed Optimization

analyze performance
Site speed
Optimize images smushit
wordpress optimization

javascript

Confetti effect

Lazy loading of images