In this tutorial...I will show you how to use brushes more effectively, and more advanced than the other tutorial.
First, make a new image, 600x600
You can add a background if you like, but I am just leaving mine blank.
So just start placing brushes all around in the middle, just one colour. Place as many as you like, but atleast more that 6.
Mine looks like this so far: (Click to Enlarge)

So now, go to Layers >> New Raster Layer and press OK.
Now, start placing more brushes over top of what you just did, but make them a different colour. I have chosen purple.
Now it looks like this: (Click to Enlarge)

Not too much different...but just the right balance.
So if you want...you can do that again, but a different colour.
I have chosen to just leave mine like that...but you can do whatever you want with it.
Now the great thing about these is that you can add pngs to them! And sometimes, they can turn out as layouts!
This is what mine looks like now...I have added a Miley Cyrus PNG + some text: (Click to enlarge)

Obviously it's not the greatest, because this is just a tutorial and I wasn't going to spend hours on it...but I'm sure that yours will be amazing! :)
And thankyou to GREG for teaching me how to do this! :)