Practising English on your own

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?