By clicking on the blue arrow box next to Favourites, you can sort the objects and/or remove several Favourites at once.

You can add any object (files, surveys, wikis, etc.), but also courses, to your Favourites. To do this, click on the blue arrow on the righthand side of the desired object and select "Add to Favourites". The easiest way to add the courses you are currently attending or have created is via the menu item "My courses and groups". Again, simply click on the respective blue arrow box.