I use HootSuite to help manage my social media venues. It's a social media dashboard that allows you to preschedule your messages (IE links to items in your shop, your actual shop link, blogs you find interesting, quotes you enjoy, etc). I can't even explain how much time I've saved using this tool.
HootSuite offers two packages; a basic one for free which is pretty much all an Etsian really needs, and a professional package for $5.99 a month. I use the professional package, but only because I run the SEO, public relations, and marketing campaigns for a creative writing website, as well as for my Etsy shop.