Inset Text
This is a very basic technique to create inset text shadow using CSS3's text-shadow property. Here, two values are given in text-shadow property (first one for the solid highlight and second one for the soft highlight). The color of the text must be darker than the background and the color of the highlight / shadow must be lighter than both of them.
This demonstration looks best in webkit based browsers, firefox and opera. Internet Explorer 9 will support it but IE8 and below won't.