In this tutorial we will learn how to make a simple web 2.0 button. So, lets start.
1) Create a new document (File -> New), select size 250 X 250 px, Transparent background.

In this tutorial we will learn how to make a web 2.0 type rounded rectangular button in photoshop.
1) Create a new file (File -> New) , and select a size (300 X 300 px) and transparent background.

In this tutorial we will learn how to make a web 2.0 type badge / sticker type button
1) Create a new file (File -> New), lets take 300 X 300 px size and transparent background.

1) Create a new document, File -> New

2) Select “Rounded Rectangle tool” from tool palette.

and draw a rectangle button share using mouse.
3) click and hold “ctrl” key on keyboard and click on layer. Thus button shape will be selected. Now create a new layer, Layer -> New…

1) Create a new file using: File -> New