How to pass the Zertifikat Deutsch B1 exam
It made me 
"OK, I didn't pass in reality but my German is good enough to do so. I'll wait for C1 before I shell out the cash."
How I did it: I had another goal which was become 'fluent in more than one language'. Most of the details are in there. In brief, I moved to Germany and lived there for a year. In this time I picked up a lot of language. Better than any course.
