Move the pointer to the top left. Click once on the appllications menu. Click once on the sub-menu and lastly click on the application laucher.
New Gnome 3 Shell:
Move the pointer to the top left corner. Move it to the Application link. Click once or more until you hit that link. Now wait... Just a bit more... Once the applications menu appear move the cursor to the right edge of the screen. Click on the menu item once or more until you hit it. Now if you are lucky there will be few items to choose from. Else take a long look at the icons list to find the one you want. If it is not there just scroll down and keep searching.