As writers we generally tend to the introverted side of things. Or at least I do. I like to hide in my shell typing away and then peak out just long enough to submit.
I think that's why it's taken me so long to get as far as I have.
We need to be fearless in going after life. Experience new things and be surrounded by people we can observe and learn from. And then, when we have taken it all and crafted our stories with it, we have to go after the publishers and editors like mad.