Let us the take the advice from sir Richard Bruton, who could speak 29 languages!
Burton said that there were no magic inwolved, just plain hard work in a metodic systeme. He used an average of 2 months to learn a new language.
Burton has left many notes about how he did approace this problem(translated from Norwegian to english by my poor me):
" I started out by purchasing/buying a dictionary and a gramer-book(book about grammer?), in wich I circled around all words and forms that I knew were neccesary. I learned all those by hearth. I never worked for more than 15 minures at the time, because after that amount of time the brain is no longer healthy. When I had learned about 300 words - something i easily could do in one week - I read an easy to get book, in wich I circled around all the words I wanted to remember. When I had read the book, I worked systematicly in even the smallest details of the grammer, than I chose a book about a subject that interessted me. The code of the language was now broken, and it progress rapidly from here. If I for instanced heard a new sound I practiced with my tounge by repeting the sound THOUSANDS(enlarged by me, it is written in normal letters) of times every day. And when I read, I always read out loud, so that the ear could help the memory on its way".
The next step was to actually use the language, and on his discoveries Richard Burtons did often sit at the fire and talking with the natives in their mother tounge.
I wonder what Bernhard will say about this.