My 3 top tips for German are:
1. read a lot of material were you understand at least 50%
then later
2. read a lot of material were you understand at least 50%
then later
3. read a lot of material were you understand at least 50%
Add some listening too, i.e. online radio to get an idea about the sound and speed.
That's the other half. The first half is to do a normal course.