Heres a great way for creating a logo, that we can use with or for any site or business.

Create a new file (File>New) that must have 1024×768 px and 72 dpi. 

Apply for this layer the next parameters (making a mouse click on the layer on the layers’ panel). Fill 0% on the layer Blending Options>Gradient Overlay

Gradient’s parameters:

 

Choose next the Ellipse Tool (U) to represent a circle colored with #6AA1EA

The layer’s parameters: Fill 10%
Blending mode-Overlay
Blending Options>Inner Shadow

Create a new layer (Create new layer) and select on it the Brush Tool (B) with blurred edges and the color #466899

The layer’s parameters: Fill 24%

Select the previous instrument to represent one more circle:

The layer’s parameters: Fill 0%
Blending Options>Inner Shadow

 

Make a copy of the last made layer and select the Free Transform option to make the copy smaller and to apply for the copy different parameters: Blending Options>Inner Shadow