I stick to Yuriy Andrukhovych's 'Eleven Attitudes for an Aspiring Writer', they're very useful. Also, an important thing I have understood is: don't think in a manner 'Oh, I have a book in my head, it's only about flushing it onto the paper'. If it is not on the paper, nor on your computer, nor on a dictaphone, it's NOWHERE. No, you don't have a 'book ready for publishing'. You just have some electromagnetic activity within your neurons, and when you start digitizing it into words, you'll understand that the tough part was yet ahead. I have a pocket voice recorder, and every time I feel I have some words to note down, I use it - it's most useful, as you don't need to take a pen or a laptop with you everywhere, you don't have to struggle with tiny keyboard on your smartphone, and - the most important part - voice is an awful lot faster than typing (if you're not the world stenotyping champion, of course). And it's convenient to have a separate dictaphone device, rather than searching the necessary application on your phone. Really.