My trouble is really that I tend to muddy the waters when it comes to motive. I get so confused trying to think of a good reason to kill that I end up with a long trail of half-reasons that somehow lead to the guy with the knife in his back. Not sure what I mean? Neither am I. Think of it this way. Instead of using a recipe to make cookies, I'm starting with a ready made cookie, trying to unmake it and then trying to make it again. It doesn't work too well. I take a crime, work backward to force some sense into it, and then try to tell the story from the beginning. Everything gets mixed up, and I get confused, but that's not really anything new.
I need to keep it simple. Jealousy, hate, love, money, standing/status, religion, greed, passion, etc. are classic motives for a reason. They work. And they work because they're realistic.
So here I go. Back to the grindstone. Back to my murder. Wish me luck!