But first we are going to add some Hot Wax to the circle. Make sure that you still have White for your Foreground Color and then go up to Image | Other | Hot Wax Coating. Instant wood grain!

Now go up to Image | Deformations | Perspective - Horizontal and the %Difference to 100 and click OK.

Now you can Colorize it or play around with it some more. The background on all of these pages was made using these techniques and so were the buttons. I hope you have fun playing with the deformations tools!

Here's a zipped version of all 4 pages of this tutorial if you would like to download it and work at your leisure.