Knowing what you want and whom you want to connect with matters.
Using social media tools like LinkedIn is a good start to speed up your initial connection with the people aligned with your goals.
According to the theory of the Six Degrees Of Separation, we all are only a few people away from everyone else.
Embrace your friends' references and contacts to get to know people that can help you in your professional pursuits.
If you don't know anyone, a brilliant strategy is to provide free talks and seminars, and in the process build a completely organic list of people who connect with you and know your work.
Creating content to attract the right kind of people towards you is a good and proven technique for getting to know people.
Understand that instead of going to them, you have to attract them to you.