Writing a book is challenging. Your writing tools shouldn't be.
1. Be ready to act on your inspiration with access anywhere
I carry my phone, IPad, or computer everywhere I go so that I never lose a thought, idea, or impression. You never know when a earth-shattering revelation will hit you. Don't believe for a minute that you will remember that great idea later. Write it now ASAP.
2. Organize your "what, who, and why" points
I am learning to fill my writer's toolbox with necessary software, apts, and tips for quick reference, for formatting, outlining, writing, editing, publishing, promoting, and marketing my book. Know who it is that you are going to reach in your writing, what it is you will write to them, and why you want to write it. Begin with the end in mind.
3. Become the writer you want to be. You were made to create.
I watched YouTube videos, read books on writing, joined writer's and author's clubs on Facebook, and asked a ton of questions. We all have a story to tell, but why re-invent the wheel while trying to tell it. Invest the time (maybe six months or more) up front to learn the process of writing, publishing, and marketing before you start writing out your dream story.