boplicity - 4:11 pm on Mar 23, 2012 (gmt 0)

A good template will set a specific class or id for each page in the body tag. That way, you can use one CSS file, and then style the page according to that class or id. For example, you can do something like:

#home .post { width: 100px; float: left; }

This way, you can make significant layout/style changes without messing with the templates at all.