I came across a simple online private journal called Penzu. It is fast, intuitive, and easy to use. There is no need to log in the site in order to use Penzu. You can go to the Penzu site, quickly drop down your thoughts, and log in later to save to your account if needed.
You can use Penzu for keeping a daily diary, expressive journal, travel journal, or the story of your life. Also, I think teachers and students can use Penzu to take notes in classes and meetings. You can hop back and forth between notes easily. Penzu puts the most-recently created documents on top and allows image insertion. You can share your entries with others via email option or you can keep your identity a secret. The best part of Penzu is that your work is saved as you type, so you never have to worry about saving. Furthermore, printing with Penzu is quite easy. The documents come out just like they look like on the page.