Best practice to learn English

There will be hardly a reasonable answer for you, as it depends on your educational background, on how long you have studied English and what level you have reached and what you aim at for what reasons. All these things are unknown to us. Actually you have to find your own way. There are effective ways and ineffectives ones, but I think they are a bit different for each individual person.

Don't look for a best method, try to find out what ways are effective and which ones aren't. And check if you can handle the tools for studying a language (dictionaries and grammars) and if you understand the language of grammars (grammar terms).

Try to think in English! It worked for me.

1. Listen to English,
2. Listen more,
3. Listen more,
4. Speak in English.

I would say definitely start off by speaking in English. Try a direct approach and link ideas and images directly to the English words you are thinking of, rather than using a middleman such as translation of your first language or picturing how the words are written in English - this will enable you able to speak more fluently and to express your ideas well. If you get stuck, think about how a young child might learn their first language and mimic the process. I have to stress that this is of course only my opinion of the most effective way of learning a less-familiar language.