I didn't have much to do with social media until about a year ago. I've always found it a conundrum that it's useful to have a social media presence to publicise your writing, but how do you build followers before you're published. A chicken and egg scenario.
I watched an event at last years summer festival of writing that talked about Twitter being a very good way to funnel readers towards an authors website and email list. So in preparation of one day having one (I hope), I decided to take the plunge and dive in. A year later I've got 1,400 followers.
Not knowing what to Tweet about, I used one of the daily writing prompts to create a very short story. There's a mix of them to choose from, including horror, poetry & Haikus, as well as a basic word prompt. They're a fun way to get started.
Other advise I've seen which rings true from my experience:
Have a pinned tweet that says a little about you, where you can include links to your authors website (if you have one) and anywhere you've been published.
It's nice to retweet, but if your stream is simply pages of retweets, you're less likely to get followers. Put some original work of your own up there too.
Publicise anything you've got published, but don't just do that, as it becomes repetitive. Mix it up a bit.
I've found it great fun to be part of Twitter. There's a big writing community, and lot's of magazines use it to publicise open submission calls, so useful for that too. Don't be nervous. Take the plunge.
If anyone wants to follow my whimsical daily tweets about a pranking pixie and an uptight angel, you can find me @KateMachon.