Search the forums for books on Photoshop. There are quite a few good ones recommended by the other CSers that you SHOULD pick up to read and practise, because without proper tutorials, you will not learn the workflow that is essential for better post processing.
Yes, WORKFLOW. Its not just one function/setting that will make your particular shot work, its a variation of processes. I am also learning the workflow myself, therefore I am no master and in no position to teach/show. Hope you understand where I am coming from.
heh. sounds fair because I forgot I'd say the same thing =)
although, maybe I'm old fashioned and believe in minimal workflow, thanks for the reminder