Advice for Etsy Sellers

Being new to Etsy, I'm always open to reading experienced seller's advice on starting a shop. There's currently a three-part series all about starting an Etsy shop on the Design Sponge Guest Blog. It's worth checking out.
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The series is fairly long, so I'll just include the links.
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(Interview with Blue Belle Bazaar)
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(Interview with White Elephant Vintage)
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(General tips for anyone starting out)
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Happy reading!