Welcome to Textkit!
There is one simple way to learn languages that works better than any other way in the world, regardless of your personal study preferences. This is to study them. Set time aside every day to study. (I imagine you knew that already, but it bears repeating from time to time.)
My second bit of advice would be not to give up if you find yourself going increasingly long amounts of time without studying. (Believe me, I speak from experience.)
And, here ends my language-studying advice. Study every day, and don't give up if you don't.
Textkit is a great place because they will nag you if you haven't been studying as much as you should. (They also happen to be pleasant and helpful.)