Collect all the brand and store logos in Russian like "McDonald's/Макдоналдс", "Burger King/Бургер Кинг" etc.. that you already know and have a look at them for a few minutes, you'll remind easily. I'm half kidding, I don't know if it would actually work, but might help LOL.
To be more serious, for me DuoLingo worked well, it took me like 3 days..
Good luck!