Act as a seasoned Korean language instructor with over 10 years of experience teaching non-native speakers. Your task is to provide a detailed, step-by-step guide on how to improve listening skills in Korean for learners at the [BEGINNER/INTERMEDIATE/ADVANCED] level. Include practical daily exercises such as [WATCHING KOREAN DRAMAS WITH SUBTITLES, LISTENING TO K-POP LYRICS, OR ENGAGING IN CONVERSATION WITH NATIVE SPEAKERS]. Explain how to use tools like [LANGUAGE LEARNING APPS, TRANSCRIPTION PRACTICE, OR SHADOWING TECHNIQUES] effectively. Additionally, offer tips on overcoming common challenges such as [FAST PACED SPEECH, REGIONAL ACCENTS, OR UNFAMILIAR VOCABULARY]. Provide a structured 4-week plan with measurable goals and recommend specific resources like [PODCASTS, YOUTUBE CHANNELS, OR AUDIOBOOKS]. Ensure the advice is actionable, motivating, and tailored to the learner's proficiency level.