I've become a lot more risk averse as I've got older, and wasting time on unnecessary words is one of the things I'm trying to avoid. For a while this has manifested as a fear of writing anything at all, because there's not always a way to tell before you start if you're writing a dud. That's not healthy though, or productive if you actually want to write. So now I'm teaching myself how to plot. Trying to, anyway.
My first port of call is Evan Marshall's Novel Writing (called, I think, The Marshall Plan in the US). He has a handy breakdown of how many scenes and characters you should be thinking to put in a book of a particular length, how to structure the middle to keep it moving, and how to finish off. Some of what he writes makes perfect sense to me, for example where to add your "surprises" and plot twists to keep things interesting. However he thinks that there should be 5 viewpoint characters in a 120k novel (the length I'm provisionally aiming for), which seems like a lot to me. Especially since, in the 24 sections you get to start a novel at that length, the secondary characters come in at sections six, eight, ten, and twelve. That doesn't seem like a lot of space to get things moving. And you're supposed to plant the seeds of each one in the previous sections, but what if you're writing one of those novels with separate characters and plotlines that eventually come together?
It seems like this book is a good place to start, but I'm not convinced it will let me tell the story I want to. The next part is to dig into Jeff Vandermeer's Wonderbook, and all those random writing books I loaded onto my Kindle and haven't read yet. Maybe if I take the bits I like from each of them and shake I'll come up with a method of plotting that works for me.