How to to use bevel and emboss properly for clean buttons in photoshop cs6

Question

I've heard of different methods in getting a nice highlight on the top of a button. Can some of you explain a preferred fx for the example here? Along side the nice highlight on the top of the button, can you explain how each button is tastefully differentiated?

http://dribbble.com/shots/391714-Archivme-iPad-app-iOS?list=searches&tag=buttons

Answer 1

Download the psd here click on the blue-button.psd text in top left corner

Its all done with gradients, inner shadow for the highlight at the top and for the shadow round the edge i used a bevel. You can download the psd above ^. Its all a little off just were a picked random colors from the jpeg.