closed as not constructive by Matthew Read Oct 3 '12 at 22:51
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locked by Matthew Read Dec 11 '12 at 15:40
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Here's a good one I found on Lifehacker a while back.
I changed a few things when I did it, like allow the text to come from any phone and send the reply to that phone, and making the SOS text a passphrase so that nobody accidentally sent it to me.
I also made one that turned my ringer up and played a song for when I lose my phone around the house. I can just text my phone 123findme and it will play a song even if I left it on vibrate mode.
Launching ConnectBot remote commands in answer to another question.