tutorials on folded/bended paper

Link : http://blog.spoongraphics.co.uk/tutorials/create-a-realistic-page-curl-in-photoshop

tutorial

http://azmind.com/2012/11/11/create-a-nice-green-contact-form-part-1-photoshop/

form

http://www.psdvault.com/drawing/design-a-delicious-contact-me-button-in-photoshop/

buttons

50 tutorials
http://www.antsmagazine.com/photoshop-2/tutorials/50-photoshop-interface-design-tutorials/