There are five keys to success in learning a foreign language.
Spend the time.
By far the most important factor is how much time you are immersed（侵入）in the language. (1) This means spending time enjoyably connected to the language you are learning.
Listen and read every day.
Listen wherever you are on your MP3 player. (2) Listen to and read things that you like, things that you can mostly understand, or even partly understand. If you keep listening and reading you will get used to the language. One hour of listening or reading is more effective than many hours of class time.
(3)
Build up your vocabulary, and you’ll need lots. Start to notice words and how they come together as phrases. Learn these words and phrases through your listening and reading. Gradually you will be able to use them. Do not worry about how accurately you speak until you have accumulated a plenty of words through listening and reading.
Take responsibility for your own learning.
If you do not want to learn the language, you won’t. (4) Do not wait for someone else to show you the language, nor to tell you what to do. Discover the language by yourself, like a child growing up.
(5)
Do not worry about what you cannot remember, or cannot yet understand. It does not matter. You are learning and improving. The language will gradually become clearer in your brain, but this will happen on a schedule that you cannot control. So just make sure you spend enough time with the language. That is the greatest guarantee of success.