There is no single "best" way to learn English that applies to everyone, as different methods may work better for different individuals depending on their learning style, goals, and circumstances. However, some effective ways to learn English include:

a) Going to school: Formal language classes can provide a structured learning environment, access to experienced teachers, and opportunities to practice speaking and listening with classmates.

b) Having a pen-friend: Communicating with a native English speaker can help improve language skills through conversation and written exchanges.

c) Listening to music: Listening to English-language music can help improve pronunciation, vocabulary, and comprehension skills, as well as provide exposure to cultural references and idiomatic expressions.

d) Reading books: Reading books in English can help improve vocabulary, grammar, and reading comprehension, as well as provide exposure to different writing styles and genres.

e) Living abroad: Immersing oneself in an English-speaking environment can provide intensive practice in speaking, listening, reading, and writing, as well as exposure to different cultures and lifestyles.

Ultimately, the most effective way to learn English will depend on the individual's preferences, goals, and resources, and may involve a combination of different methods.