Any extra task will help, you can use all your senses for a well-rounded learning of German: listen to what people are saying online, watch and see how people behave in German films and video clips, touch each page of the book you are reading, smell and taste the German cake you are baking
The more you expose yourself to German, the better you train your ear and your understanding. The following will have something for any level of German so take a look.
Watch it and see if any of the suggestions suit your taste - einfach Deutsch lernen
2. Duolingo could be an easy and competitive free app on your phone to revise and improve your German - you could race against your friends.
3. Bake something German and enjoy it with your family. What about Käsekuchen?
Check out the receipe here or follow the step by step video on youtube:
