To improve your English pronunciation, listen carefully to native speakers, practice speaking aloud daily, use pronunciation dictionaries, record yourself to identify areas for improvement, and consider working with a language partner or tutor who can provide feedback.

Read extensively in English, keep a vocabulary journal, learn words in context rather than isolation, use flashcards or vocabulary apps, and practice using new words in sentences. Aim to learn 5-10 new words daily and review them regularly.

The time needed to become fluent varies based on your native language, current level, learning methods, and practice time. With consistent daily practice, most learners can achieve conversational fluency in 6-12 months. Full fluency typically takes several years of regular use and immersion.

Common mistakes include incorrect preposition usage (in/on/at), article errors (a/an/the), word order issues, literal translations from native language, incorrect verb tenses, and pronunciation of similar sounds (v/w, th sounds). Being aware of these can help you avoid them.