Becoming Introverted

While extroverts are primarily concerned with what’s going on outside themselves, introverts are preoccupied with their inner world. One way you can shift your focus is to keep a journal, and commit to writing in it every day. Some introspective questions you can ask yourself are:

How did I feel today?
What did I learn today?
What ideas did I come up with today?
How was today different than yesterday? Than last week? Than last year?
What were my favorite (and least favorite) parts of the day and why?

http://www.wikihow.com/Be-More-Introverted-if-You%27re-an-Extrovert