In this thoroughly explained photoshop lesson, you will see how to create modern button which you can use for any web site.
Step 1Create a new document, dimensions 130x80px and white background.
Step 2Take the Rounded Rectangle Tool, with the settings like it is shown on the picture below.

and create the shape for button
Step 3Now, we will apply the following styles on our button shape.
Drop Shadow

Gradient Overlay

Stroke
For stroke size set 1px, and for color #9EAB48.
Our button now looks like this:
Step 4Create a new layer. Take the Elliptical Marquee Tool and create a little selection on right side. See the picture below.
Step 5Fill it with white color and add the following styles.
Inner Shadow

Stroke
For stroke size set 1px, and for color #95A339.
Step 6Now, our buttons looks like this:
Step 7Create a new layer, take the Rectangular Marquee Tool and create three selection and fill it with the colors like it is shown on the picture below.
Every selection is 1px wide.
Step 8Only one thing, that we must to do, is add a text on the button and we're done.
I have used Ms Trebucht Bold font, size 12px, smooth. On text I have also add 1px stroke, this color #7D8928.

Have a nice day!