Use a variety of different techniques to make a stunning button
Step 1
To start off with create a new document 540 by 220 pixels and fill the background with a dark radial gradient (the colours are #242424 and #060606).
Step 2
Create a new layer (Ctrl + Shift + Alt + N) Select the rounded rectangle tool and make a selection of 200 by 50 pixels with a radius of 15 pixels in the middle of the document.
Step 3
Set your foreground colour to #007dee and your background colour to #023f78 and make a radial gradient (using the foreground and background colours) from left to right in the selection.