When I tell people about the necessity of being organized, efficient and productive in their writing, I recommend they try outlining, blueprinting and mind-mapping. Any one or more or combination of those three will improve performance greatly over the usual “just sit, start writing and see what develops” method.
I particularly like the mind-mapping method and highly recommend the software Freemind (http://freemind.sourceforge.net/wiki/index.php/Download). There is no charge for the software and it works on Mac, Windows and Linux.
I am also impressed with a couple of online services that offer both free and low-cost accounts to those who would like to do mind-mapping. Mind Meister (http://www.mindmeister.com/) and Bubbl.us (http://bubbl.us/.)