Best place to find them is by viewing the various shortcode demo pages imported by you or you can view them all in the demo site live with the code used. Here is one such example. All of these shortcode pages are accessible via the Pages menu on the top right of every page in demo preview site –
A few shortcodes which require more explanation (involving custom post types or the [segment] shortcode which appears in lots of places) are explained in the documentation. The shortcode builder tool available in the visual editor also helps.