---------------------------------------------------------Plugins: Align Object, Color Filter (optional) - Added by EER
1- On a blank canvas make your base shape, I used a rounded rectangle, and use the Align Object effect to center it one the page. (You dont really have to center it if you dont want to)
2- Make the same shape but a little smaller in white on a new layer and cut it leaving only the top half, then select the gradient tool and switch it too linear :LinearGradient: transparency mode :AlphaChannel: . Now right click near the bottom of the shape and drag it towards the top like in the picture, you can repeat this action a couple times until your happy with the result.
3- Make an inner outline of the first shape on a new layer.
4- With the lasso select tool :LassoTool: select half of the outline.
5- Now select the gradient tool again but instead of the linear gradient use the radial gradient , left click on the top left edge and drag towards another edge until you get the desired effect.
6- Make a new layer above your base shape layer and add your logo/text/whatever.
This next couple of step shows you how to add some color to a white shape so if your logo is already the color you want then you can skip them.
7- If your logo is white then you can easily add color by using the color filter effect plugin. Then if you want you can duplicate that layer and make it a darker color and use the gradient tool (radial, transparency mode) to remove some of that layer then flatten the two layers, this will give your logo a nice effect.
8- Duplicate your logo layer again and use gaussian blur :GaussianBlur: on a low setting then drop down the opacity on that layer.
This pic shows the layers and the opacity settings for each one.
And here's your result:
You can add drop shadows, reflections, maybe a little glow effect, just experiment and have fun!