After completing Swedish tree
I have completed Swedish tree and reached up to level 12. How to move on further ?
I like to buy a novel I've read and liked in another language when I learn something new. Preferrably something that's not absurdly hard, like Umberto Eco in Italian. For instance, I'm currently reading The Lord of the Rings in Spanish - fourth language I read it in. :)
Comics are also often a good idea, although I'm generally less fond of Swedish comics.
Watch swedish news: http://www.svtplay.se/rapport Read a book (choosing a book is easier said than done if you can't skim the pages beforehand to see how well you're doing) - maybe start with a book that you have already read, Harry Potter maybe?
And of course: continue using duolingo, you could also start on some immersion articles.