TOEIC Study Plan

The result of my serching on the internet I knew that the best of way to the studing for TOEIC are shadowing and understanding grammer.
First, don't do shadowing slowly. Try to understand the words and grammer. And try to study listening parts of past TOEIC. This way to studing don't have to study in time to study. We can study it in our free time. Forexample, time to going to school, in our lunch time, and so on.
Second, try to understand basicly grammer. If you don't understand it, it's difficult for you to get good score in TOEIC. So you should try to study easy and basicly grammer. It's very inportant things.
So I keep these two things in my mind.