In this tut I'll show how to add some shine, or sometimes called web 2.0, glossy, gel.
A pumpkin from paths.
Next duplicate the layer with the shape, we are going to use it as a mask for a selection.
Take the rectangle tool, and make a selection about 1/4 from the top of the image. As shown below.
We don't want whats in the part that's in the selection, so delete that part, and release the selection.
You can delete the layer. Then add a new transparent layer on top, set its mode to screen, just as we did for the red circle. Be sure you keep the partial selection.