If you are a new creative writer, one who plans to eventually write a book, or even a timeline of blog posts, keep your notes in order (dated, and all in one place). Period.
A personal journal is also a meditation tool. My journal is a place where I empty out my thoughts, random or otherwise, and as I write I am carried off deep into the wilderness of my mind. Scary, right? Not so much. I find answers, I find peace, and I find where I want to go next (from here, from today). Think about it. I am talking about me and my life as I write. No holds barred. I write and then I am able to unlock as the words flow.