A U.S. citizen, an aid worker whose doing work at the time of the earthquake in Haiti, downloaded an i-phone app while he was stuck in the rubble which eventually saved his life.
This app told him to NOT fall asleep. Therefore he set the alarm on his phone to wake him up every 20 minutes. By the time his battery was about to die, he has already trained himself to only sleep for very short periods of time.
HCI-ers keep up the good work! Keep thinking of ideas that can positively impact the world.