Practice. Use the language socially and casually. If you don't have an outlet for that, consider hiring a tutor. You're probably at the point where you want

Practice. Use the language socially and casually. If you don't have an outlet for that, consider hiring a tutor. You're probably at the point where you want someone with some experience with more advanced (near-fluent) students. Do the entire lesson in English. Something like a guided conversation where they move you through some topics in a structured discussion. Could be about English grammar, or the daily news, or some literature, or just popular culture. Whatever you like. They will ask questions about what you've been talking about, ask you to restate what they said, or ask questions about how you feel about the topic. Repeating this kind of exercise regularly can be very effective. (And if your tutor doesn't correct your word choices and pronunciation almost constantly, you probably need a new tutor.)