If you have decided that you want to write a book, but you are having trouble deciding where to start, here is a tip for you. Sit down right now and start. Sit down at your computer, or at your desk with pen and paper, and write down everything that is in your head right now about what you want to write about. It is that easy to start. Once you get started, it will be easier to keep the momentum going. Set aside time each day to write, and before you know it, your book will be finished.