In elementary school I had learned the German language for six years, my skills were at an intermediate level, but then I started with English and I haven't learned German for nine years.
Now, my level of German is very poor and since I want to spend some time in Germany, I am trying to learn it actively again.
Now I am afraid of forgetting it and Spanish, which I also learned (it's really depressing to forget something you have already known), so I want to stay in touch with them. Unfortunately, I don't have enough time to study them all, since I work 46 hours a week + the German course. Therefore I try to read the English book or repeat the vocabulary from Spain during traveling to work and sometimes I watch English movie (with English subtitles). I don't know whether this is a good way.
What is the best method not to forget, or even to improve them? How do you access to languages you have already learned?