Given that sex in novels is currently selling so well (and if you haven't heard of Fifty Shades of Grey where have you been?) maybe we should all be adding sex scenes into our stories. That's assuming you write stories. It's hard to add sex to crochet although it has been done (NSFW); if your hobby is photography then the answer is obvious; if it's astronomy or quantum physics then I have no advice for you here.
It might be hard to find an angle that hasn't been tried yet. Indie Reader has an amusing (and NSFW) article on current erotic bestsellers, many of which apparently started life as Indie books.
So sex is clearly the way to go if you want to make money from writing. My problem? I just can't do it. I was going to write a spoof of Fifty Shades but when it came to it, I was cringing and laughing too much to get words on the page.
What about you?