Three stories, five books and not enough time

I realized today that I have actually started three separate books. I’m stunned. And worse, I don’t know what to write.

• Mermaids: This story revolves around a political turmoil in a mermaid world. Nessa is the youngest daughter of the king but wants to be queen. Under their government, she can be elected as queen.  However, it is only through the Adamahs, humans who have been changed to mermaids, that she can do this.  In this I have the election, and the result afterwards, and it’s really awesome. :)
• Intentional Accidents: This story revolves around two characters, a pirate and an assassin. They’re stories  interweaves into smiliar threads and storylines but I only know about the pirate. She is feeling lonely, hurt and wants off the pirate ship but doesn’t see a way to get off. A police man unknowingly gets on the pirate ship and encourages her to find her own way. The assassin is also tired of her life, wants out, but doesn’t know how to leave. I haven’t dealt with the assassin much, focusing on developing the pirate story, then the assassin, then merging them at the end.
• Mindskill: In mindskill, a doctor develops telepathy as an implant. He implanted his daughter without her knowledge, understanding that soon it would be a necessary skill to survive. He dies though before he can tell her, in an “accident” and she must discover the truth for herself, along with a plot to take over the world and a plan to keep those with this skill safe. This was going to be my shot at writing a trilogy (Which is a huge task, let me tell you.)

I’ve written 36 words of Intentional Accidents (9,455 words), 93 pages of mindskill (25,000) and 61 pages (16,000 words) of mermaids.

Here’s the problem: I like them all. I stopped mindskill because I needed to develop it more. I stopped Intentional Accidents because I needed to skim and I didn’t know how to. (I’m playing around writing the ending scene to that.) And I’m currently writing mermaids (which may not end up being mermaids, which makes me sad, but that is fact.)

I have every intention of finishing all of these. All of them are probably good. But how? I’m mean, seriously, I probably have enough to write about for three years (at least), not to mention that I  need to write synopses to send these books out, and I want to write Sagi’s tragedy (short story), and I’d really like to write one of the stories my friend and I write out (novel), and I’d like to edit Hope (or at least make a logical decision whether to toss it), and edit Giant’s Wife and–

*stops for breath*

I just have too many ideas I think. How do I choose?