Learn some foreign songs, it really helps :)

I can tell you how I'm learning froreign languages xD I'm watching movies, reading comics, articles, books. Next step is learning words which you don't understand. I can recommend you awesome program for that - Anki. With it you will not forget everything :D And what's important. Learn whole phrases NOT an individual words. It was my the biggest fault with learning English. So that's why my grammar sucks! xDD

When I am reading interesting English stories and articles I can remember new words easily.

if you have faced this type of problem. firstly you have to do working hard. and get up early in the morning and do start walking in the grass.