This week's expression is for all of you who are having exams these days
practice makes perfect
and it means that doing something over and over again is the only way to learn to do it well. So, if you practise English a lot, you'll do well in your exams, for example.
I know it may sound as something teachers say a lot. However, when it comes to languages, practice is everything. I've learned from experience that if you watch many TV series in English, you'll improve your listening skills; and if you read a lot of books, you'll improve your reading comprehension.
So, now that you know how, you just have to do it!