I would suggest you two paths, and none of them are text indentation (which is an obsolete method). The first way is to remove the text, and instead it will declare a title to your anchor, for example:
<a href="index.php" id="logo" title"My Website"></a>
The second way is to add an image to this anchor tag:
<a href="index.php" id="logo"><img src="path/to/image" alt="My Website"/></a>
These two methods are much better than text indentation, especially because a few months ago Google announced that it radically changed the way indexing sites to prevent links to bites and other forms of fraud, which means that text indentation will not look good, perhaps not from the very beginning, but will try to wean people from him.
Watch this video: http://www.youtube.com/watch?v=fBLvn_WkDJ4&feature=player_embedded
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