When in Doubt, Add Villains

Plots are my weak spot.  Although I have problems developing at least one fairly major character per book, the other characters work out without much effort; the dialogue goes swimmingly; and describing things vividly and efficiently is my favourite part of editing.  But it takes me a long time to find out just where it's all going.

I wish I could report that I've discovered the key to easy plotting.  Alas, I had to get help outlining the novel I'm currently writing -- even though I knew more or less everything that was going to happen!  I have, however, stumbled upon one trick that helps move the story along: add more villains.