.some-selector {
	-webkit-text-shadow: 2px 2px 3px rgba(0, 0, 0, 0.5);
	   -moz-text-shadow: 2px 2px 3px rgba(0, 0, 0, 0.5);
	     -o-text-shadow: 2px 2px 3px rgba(0, 0, 0, 0.5);
	        text-shadow: 2px 2px 3px rgba(0, 0, 0, 0.5);
}

When using a CSS3 property that has vendor-prefixed versions available, I indent as usual with one tab and then use spaces to line up the properties on the colon. This allows for easy editing of all ‘sibling’ properties at once using [Sublime Text’s](http://www.sublimetext.com/) multiple selection feature ([video demonstration](http://youtu.be/czQipWJA8EU)).

Lining up vendor-prefixed CSS properties for easy editing in Sublime Text

CSS3

CSS