Androo's Simple Aqualike Look:
make a new document, a size that's equal (128x128, or 256x256, or 800x800, you get the point).
Then select the Eliptical Marquee Tool ( the circular selection tool
), click and hold shift, and drag, so that you get this:
Then get get the gradient tool (its the second paint bucket tool), and then look on the top left of your screen. It should show a little gradient. Click it and a little popup thing comes out. Select foreground to background and hit OK.
Make sure white color is ontop, and another color like blue, red, green, or yellow is the other color (White is foreground, redbluegreen or yellow is background.)
Then hold shift and click at the top of the circle selection. Then drag down to the bottom of circle (still holding click and shift). Then you get a gradient
.
http://penguinn.com/tut/step4.gif
Then look at the top left of the screen and double click that little gradient again. Select foreground to transparent.
Then hold shift and click at the bottom of the circle and drag 1/4 up the circle. Then you have a nice circle!