Trying new method of learning English

I bought 2 books for studying English today. I'm thinking about trying new method of learning English after I take TOEIC exam on 26th this month.
Left book, "Dialogue 1800" is for increasing my vocabulary. Right book, "Eigo mimi (English ear)" is for improving my listening skill. I put emphasis on my 2 weak points.

By the way, I heard English wrong again. It was almost same mistake I made the other day.

I caught an English sentence a speaker said.

"A man is taking office hat."

What is the office hat? Correct answer is

"A man is taking off his hat."

Whew...