This advice applies to many things in life -- getting a job, proposing marriage, networking in general.
For instance, I've occasionally met people who obsess about crafting the perfect CV. For many of those people (not all) if they'd brought the same level of intensity to doing good work in the past, they'd be fighting off would-be employers, without any need to sprinkle pixie dust on their CV. Ditto people who try to find some magical method for networking. Do awesome work, and networking becomes mostly a matter of showing up and saying plainly and understandably what you've done.