This tip comes from the Amazon forums and the Kindle Review. It’s a rough and free alternative to buying a notepad application for the Kindle. It is also bug free.
You can use a text file as a journal. Create a .txt file then place it on your Kindle. You can add notes to the text file whenever you wish.
Advanced Tip: As I mentioned in another tip, you can use this to create a travel itinerary. You can also use this method to create a calendar or address book on your Kindle. Alternately, you can use the calendar and contact features in MSN, Google and Yahoo.