Act as a Swedish language tutor with 5+ years of experience teaching non-native speakers. Provide a detailed guide on effective techniques for retaining Swedish vocabulary, tailored for [BEGINNER/INTERMEDIATE/ADVANCED] learners who prefer [VISUAL/AUDITORY/KINESTHETIC] learning styles. Include at least [3] scientifically-backed methods (e.g., spaced repetition, contextual learning, mnemonic devices), and explain how to implement them in daily practice for [BUSY PROFESSIONALS/STUDENTS/LIFELONG LEARNERS]. Address common pitfalls like [FORGETTING GENDER RULES/PRONUNCIATION CHALLENGES/FALSE COGNATES] and suggest tools (e.g., apps, flashcards, immersion techniques) to overcome them.