To design... Options

[FoxLucky]

"Design is a response to social change"

I've been hooked on the myspace/graphics, so much that I had to have Photoshop!! I've never taken a web graphics class in my life, but I feel like I have a touch for it, even though I'm just starting out...
After looking at designs, I think sometimes "wow, how did they do that?"
So I guess I'm asking, what is the inspiration?? And after you've gotten that inspiration, how do you turn it into your own style?? How do you put a grasp on your ideas and weave into digital images... I still haven't the faintest clue on how to take the ideas I have in my head and convert them to the beautiful images on Photoshop. What steps is it that you do to design?? How do you always know what you are doing?? Where did you start??
Any opinions appreciated...

*Thanks*

Brittany