I plan to keep my notebook in my office as well in a secret spot
I can usually remember my usernames/passwords but if I need them I'll be able to access them quick...
Another question for you -- My daughters are getting older and my oldest has email and facebook -- I required she be my friend and let me know her password, she had no objections, she's a good girl, but I just want to keep watch over her
... What is your policy for your kids?