The power of leaders lies in their network. Leaders look at not only who is in their network right now but also who should join their network.
They are also very much aware that it isn't who you know but who knows you.
How do people get to know you?
Make those calls.
How many business cards do you collect? Often people think that only salespeople make calls. I've found that leaders make calls too. Most leaders are more active callers than most salespeople. They make calls to re-introduce themselves to others, they make calls to share opportunities, they make calls to keep themselves known to others. They make calls to refer people to each other and they make calls.
So build your network, Build your leadership leverage. Make those calls