Spend your next one-month vacation in the country whose language you want to learn. It's that simple. In the meantime, read all the books you can so you don't

Spend your next one-month vacation in the country whose language you want to learn. It's that simple. In the meantime, read all the books you can so you don't start from zero when you get there (although it will feel like you are starting from zero the first few days).