Do you have a story lurking in your mind? Or a string of words are gradually forming in your sub-conscious? You should write them down.
Whether on a sheet of paper or on a memo on your electronic device, make it a habit to document your thoughts and ideas. You’ll regret it if you don’t.
Like the quote above says, keep a notebook or a journal, travel with it, slap into it every stray thought that flutters into your brain. Those stray thoughts might become a bestseller.