what is the first thing that you use to improve your English?

The first thing that I use to improve my English is thinking. I will think everything I can see and everything I want to communicate in English and then speak out. For instance, I sometimes talk to my friend in English on the phone. And I release my feelings by complaining in English with myself.
Another way to improve my English is reading. I will read every word I can see by the way I have passed.