– Blogging (not writing for hire)
– Facebook
– Twitter
– LinkedIn
– Google+
– Other such as YouTube, etc.

(This is all outside of face to face networking.) My biggest single lead was from LinkedIn – I wound up passing the work along to a friend, but it was worth $100k easy. Consistently it has been Twitter that landed me the most referrals. Now it's Google+ by a long shot. Of course a lot of it has to do with the network that we choose to focus on and spend the most effort.

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