This is a simple one, but makes your code pages stand out and easy to read. Simply add this to your style sheet and you’ve got a nice new look to those code blogs. Note: Make sure your code starts on the line under the code statement, otherwise there will be no top padding.
background: #FFFFCC url(./images/code.gif) no-repeat 92% 92%;
margin: 10px 0 0 0;
padding: 0px 10px 11px 10px;
border: 1px dotted #000000;