How to I study English

I'm going to introduce about how to I study English. Before I entered the university, I thinked that trying "Speed Learning". It is advertied TV CM. But I stopped buying it as it was quite a high price. So, I'm studying the book of English word "Target1900". And I have to study more English for TOEIC. This year, I examined it for the first time. The result was worst for me. So, next time I'm going to endeavor for TIEIC.