I think Japanese is very difficult,but I want to learn well.I haven't found a good way,please give me some advice.Thank you~~
Try Spaced Repetion Learning with handwritten or electronic flashcards. The interval is 5 seconds, 1 minute, 5 minutes, 1 hour, 5 hours, 1 day, 1 week, 1 month, 6 months, year. It's pretty scientific. Many different sites have useful vocab lists or you could start learning with a book. Start giving yourself a foundation with grammar and basic words then move to more advanced vocabularly.
Start speaking practice here too, 3 or 4 times a week can really help you reinforce the vocab you know.