1. Engage irregularly
If you want to master English quickly, study regularly. Try to stick to a clear schedule all the time.
2. Do not focus on spoken English
Knowing one grammar, you won't get far. Practice in spoken English is an indispensable condition for its successful study. Pay more attention to improving your conversational skills
3. Engage in grammar cramming
Stupidly cramming grammatical rules is an absolutely stupid occupation. Do not be surprised that as a result of this approach, a mess is formed in your head.
4. Ignore learning English with "ears"
Don't expect to speak English if you don't pay enough attention to listening to audio materials. Listen to audio lessons, acquire listening skills.
5. Memorize single words
Memorizing words taken out of context is another mistake. The best way to replenish the vocabulary is to learn not individual words, but phrases as a whole. If you meet a new word in the text, try to learn it in tandem with another word that goes with it.