One of the most remarkable obstacles when trying to shave off any accent or just trying to hone in your grammar skills is lack of understanding of the language

One of the most remarkable obstacles when trying to shave off any accent or just trying to hone in your grammar skills is lack of understanding of the language learning process by most native English speakers, as most of them can only speak their own language, if so. Best advise I can give is, move to a country where English is broadly spoken (Scandinavian countries come to mind) and work in one of many English-speaking companies there. It'll be much easier to shake off at least most of the grammar mistakes (ESL speakers are actually rather proud of their grammar skills) and hopefully also soften any regional accent. As a bonus, you might also catch some other language basic skills. In the EU, NL and BE (Brussels area) are also good choices.