One of the problem most of the WordPress newbies face is highlighting their codes in the post. Some even go to the extend of writing their own extension for this purpose. When there are better solutions. Google Syntax Highlighter Plugin is one of the best plugin out there which does this task wonderfully. Its based on this work by Alex Gorbatchev . Here is a screen shot of what it can achieve
Tips on everything you would ever need while hacking wordpress themes and plugins.