Tumblr gets more attention here than almost anywhere else in this network, across several posts working out how a small business might actually use it rather than assuming nobody does. Trina King pairs it with a social platform most people already understand, and the combination is the point.
Her Facebook advice is straightforward and comes down to showing up. Post every day, respond, and stop treating the page as a noticeboard, because the platform rewards participation and very little else.
She writes about converting people who already like a page into people who will actually respond, which is the step most businesses skip entirely.
One post recommends a very old book about the mind, and it sits strangely and pleasantly among the platform advice.
A fitness challenge appears with prizes attached, and she uses it to argue for video, on the grounds that people trust a voice and a face more than a page of text.
Start with the Tumblr posts.