However, the most important thing is CONSISTENCY!
You will get an excellent result by devoting 20 minutes EVERY DAY, rather than two or three consecutive lessons, then nothing for a week or two.
The brain records and learns through regular and sustained repetition.
Following the instructions and advice given in the introduction, you will be really surprised that after three months will reach you already understand what we are talking on TV, radio or in a song, but mostly you will begin to train for sentences in your head, playing with words and also to be able to initiate a simple conversation but believed in the language concerned. You will surprise yourself to think in the language learned!
For 30 years I know the Assimil method. Today I speak five foreign languages, including three fully learned with this method. What a pleasure to go to a country and to be able to speak and understand the natives. This provides an extraordinarily rich and really discovered the true facet of the country visited. And you will be surprised of the reaction vis-à-vis indigenous you.
I have tried other methods, but for me, nothing beats Assimil and I always come back. And frankly, the investment is really worth and I guarantee that you'll really get for your money (if you are regular, I repeat).
With sixty years of existence, this method has been widely proven. I highly recommend it!