joolsy3 on "Styling posts"

Hi All,
I'm trying to figure out how to style posts in D5 template, I know how to style content on my site using CSS but how can I get all future posts to show the same styling since each post will have a different .class.

Posting a link to your site or a demo of the template would be help.

whoops, need to close the link, here it is..

http://jsenior.richmondit.net.au/wordpress/blog/

as you can see i'm a complete novice :)