English Learning.

Learning English is a never end task, because English, as any language, has been described as a living entity.
Languages is evolving every day, and there are new words, especially related to new technology.
It depends of the preference and necessity of everyone. Some would like to be interested at reading, other at writing, or listening or speaking, although the best is to consider studying all these areas.

It doesn't matter if we have mistakes when we read, write or speak, the important is to contine practicing and learnign from our mistakes.