How you could read in my first post I learn 4 foreign languages - (Chinese, Spanish, Russian and English) and my favorite tool which I use everyday is Anki.
Anki is a program which makes remembering things easy. Because it is a lot more efficient than traditional study methods, you can either greatly decrease your time spent studying, or greatly increase the amount you learn.
The program is based on the customized flashcard - you use the flashcard decks created by other users or create your own flashcards. You can modify and create new ones. You can add not only translation but also recording, pictures, sample sentences and more. You can synchronize the decks between multiple devices and learn on computes, phones or tablets. And what is great the program is 100% free :)
Below you can see some of my flashcards which I created for learning Chinese - first part is in Polish so I will write the english translation on top of it:
Car:
Order(food):
Swim:
