I'd say my biggest weaknesses are my way of explaining and the fact that I get lost thinking about plot points. I've had readers point out it getting confusing and I've been trying to get better. That takes care of one.
The other one causes me to constantly be in danger of destroying the storyline. I have a not very detailed outline of what's supposed to happen. So when I get to parts of the story in my head, I'm lost thinking of the setting and what's supposed to happen exactly. The good thing, I guess, is that the characters mostly write themselves. So, if I can get the setting and events right, the dialogue part comes naturally.
But thinking of scenes is deadly. It took me two months to get the first chapter into shape. And then I got lost again two chapters later, for two weeks! I just hope I can solve these. Fast! 