Practising English on your own

[Competent]

Of course everyday long-term talking to native English speakers on a multitude of topics is a top priority and a paramount factor for developing good English speaking skills by learners of English. However, in addition to this, self-study and practising English on one's own are indispensable, and substantially accelerate success in English. Communication with native English speakers can't encompass all aspects of mastering English adequately and thoroughly, especially vocabulary, grammar, potential in-depth content of conversations suitable for real life needs of students for using English. It's possible and effective to practice English (including listening comprehension and speaking) on one's own through self-control using transcripts, books, audio and video aids. My articles on English learning methods are applicable to self-study and self-practice as well. My question for a poll is:

What are the best ways and aids for practising English on one's own using self-control?

[Competent]

Have you noticed that interpreters have to possess the most thorough knowledge of a foreign language (especially of conversation, vocabulary and grammar)? Perhaps foreign learners of English can achieve fluency in English also through oral translation from their native language into English with the methods described in my articles on English learning methods. It is possible to exercise self-control (that is to check yourself) this way when practising speaking in English every sentence in ready-made materials with both a foreign language and English versions. I also believe that the value of oral translation from a foreign language into English with self-control is underestimated by English teaching specialists for self-study and self-practice of English conversation, vocabulary and grammar.