gistfile1.txt

How to freak out your friends in case you die:

Set up cron job which runs every six months and sends an email 
to your friends if the modify time of a given file is more than 
six months ago. The email should include the contents of the file.

Update the file once per month with notes and responses to your 
latest conversations with your friends until the day you die.

Result: http://www.huffingtonpost.com/2012/03/14/dead-man-emails-jack-froese_n_1346194.html