One of the most interesting additions to your page theme would be a page peel.
The original discussion can be found in the PrestaShop forum and you can download the module at http://www.PrestaShop.com/forums/viewthread/28408.
Peel page is quite interesting as the image is, in a way, hiding or peeping at the user making them curious. When a user clicks to the corner, they will be directed to a page you want to highlight or any main promotion you have.
/prestashop/modules/) and unzip it.