I write everything in TextPad first, saving as I go with Control-S to the appropriate directory using the date & time in the file name. I like to work full screen in large letters and I love lime green on black.
I have one corporate client that deletes all emails every 6 weeks (for legal reasons). Seems like I'm the only one who has a record of anything because of my practice.
I operate under the assumption that anything free will go away at some point. I plan on moving somewhere else with my data. Also, it's really easy to find anything on my hard disk.
A little background:
Years ago, I found my best friend from college and we started to exchange emails. I emailed him a trivia quiz with 20 questions. He later told me that he was laughing like crazy while he answered them for the next hour. His wife called him when he was on Question #19. By the time he returned, his computer had crashed and he lost everything. (This was obviously pre-Gmail.) Now we'll never know what he answered.
I don't know what will be important later, so I'll never let anything like that ever happen to me.