This guy has been living in Japan for a while now and his down-to-earth vlogging style makes it impossible not to like him! In this video he talks about his experiences of learning Japanese and mastering the dreaded Japanese kanji!
To be honest, I think there's no fast way to success. Studying in any language is all about passion and effort. Without effort, your studying will never amount to anything but without real interest and passion, you'll never be willing to put the effort in. It's a hard slog and it's something you have to be up for for the long run but, speaking from experience, it's definitely worth it!