Flashcards are a great way to review vocabulary. Anki is a popular flash-card application. (Anki, written 暗記, means memorization in Japanese.)
As you learn Japanese, the free Japanese quizzes at Nihongo-Pro are a great way to keep track of your progress, and pick up a few new words along the way. Try a new intermediate Japanese quiz every day, and your Japanese skill will improve steadily.
When you're ready to really move forward with learning Japanese, we hope you'll consider online private lessons at Nihongo-Pro. Our classroom, teachers, and lessons are second to none, and we offer some of the most affordable lessons of any online Japanese school. Compare Nihongo-Pro, and see for yourself what sets us apart.
Here's to your success in all of your Japanese studies! Ganbatte!