I have always believed that Luck comes to the prepared.
Be focused. Do your homework, so when opportunity knock bangs on the door, you recognize the sound and run to the door and walk through it. Network, Network, Network. Over the years, I have had opportunities come out of what might look as happenstance. However, because I was focused and prepared I could see where the opportunity was hiding. As a consultant, I want to be the first phone call someone receives after they realize they have a problem.