It seems like common advice for unestablished novelists is that after you send your manuscript out, you should take a break from that novel and work on another project. It’s also advised that you should not begin writing a sequel in a series until the first book is picked up (supposedly, agents and publishers prefer a debut author’s first work to be a standalone so they need not commit to a series; of course, I’ve heard the opposite as well–people love them some trilogies).
Anyway, getting to me—’cause that’s really why I have this blog, to talk about me doing stuff—I’m considering doing all of the following at the same time: begin writing a sequel to my currently unagented manuscript; begin writing a new, unrelated novel; and continue editing my older manuscript and drafting an agent query for it.
Good idea or bad idea? I’ll think about it.
[Edit: I didn’t starting another project ’til a month or two after this post, and I only got about a quarter of a way through the first draft before I set it aside to start on another project that I’m much more likely to finish, referenced in this later post.]