Thanks alot for the great replies
Theres loads of help on the net if you know where to look. Just do a search on google, of Photoshop Tutorials. Loads will come up.
I had a taster of Photoshop in College, which is how I learnt the basics. From there I've just tried to progress, testing out effects, etc and how they affect an image.
With photoshop, the best way to learn is to experiment with random images, seeing what you can get.
As when you know what your doing, and what sort of effects generate what sort of effect, the program becomes very easy to work around, and you can do just about anything you want.