My Twitter activity is sporadic, consisting mostly of art/fic retweets, banners/promos for my own fics, and the occasional threadfic. I don't always follow back, simply because the content you're primarily interested in may not align with mine, but I deeply appreciate everyone who follows/likes/replies to my stuff!
I'm regularly on Tumblr, but I rarely promote there - it's just a quiet place for me to reblog art and memes :)