I few weeks back i stumbled upon this site that does some crazy good tutorials called Abduzeedo.
Being that I've not studied photoshop but enjoy mucking about on it and it being a useful instrument to master i found this site really inspiring and helpful and i hope you do to.
This is what i made from my first basic tutorial (click on image to get a closer look)
Here is the Neon Light video tutorial. Go buck wild!
There's loads more style and effects on the site so have a look and see what you'd like to learn or do. Abduzeedo.