If you consider yourself to be unorganized, becoming organized is not impossible; but will require effort and stick-to-itiveness. It's wise to get a book that can assist you to get it done. Decluttering Secrets - Tips and Tricks to Becoming Organized is designed to get you moving in the right direction. You will need to have a plan so that you can know what you are going to do. That plan is outlined in the book and if you really stick to it, you will certainly see positive results.
Maintaining those results and making it a part of your lifestyle for good is a different thing because relapses do happen. This is why the final chapter on preventing the re-accumulation of clutter is as important as you will learn how to "set your mind" in a way that's conducive to rejecting buildup in your life and hopefully have you on your way to becoming organized with no more clutter.