What are the best ways for adults to learn a new language?

I'd say the best approach is to combine structured learning with real-life practice. Adults often overthink grammar rules, but actually using the language daily makes a bigger difference. Take my colleague in Shanghai - she improved her English dramatically just by switching her phone settings to English and joining weekly language exchange meetups. That immersion forced her to think in English naturally, rather than translating from Chinese. Of course, some textbook study helps with fundamentals, but without regular conversation, the knowledge stays passive. What really works is creating situations where you have to communicate, like ordering coffee or asking directions, even if you make mistakes.