I don't know what to do next

There's a kind of weird, nebulous space between projects, that I've never been very good at handling.  I've fairly recently finished a book and a blogging project, and I don't have something lined up immediately to start.  Nothing seems to be really grabbing at me. I don't want to stop writing anything serious, though.  I don't want to stop having a big project to focus on.  Because not having a big project seems to be one of the biggest ways I cause myself to collapse into long-lasting depression.

So, right now, I'm trying to cultivate an atmosphere of intentionality, within which I hope to persuade myself to start writing something big.

Here are my ideas so far:

  • A series of short stories -- say, 5, one a week.
  • A young adult novel about how difficult it is to work out how to tell if something is true
  • A new installment in "The Book," exploring another metaphorical direction.

I'm open to suggestions.  In the meantime, I'll be trying to figure out how it is that I get myself to the psychological space where I feel compelled to write a book.