Also, if riding alone, don't ride "stupid" when you're alone!
I have Google maps on my BB with Google Latitude running. My wife and kids can see on Google maps where I am at all times within a certain radius or at least where I was last reporting from. And yes, when I travel alone, I always lay out my route for them in case of emergency. Last, I keep my cell phone in the upper pocket closest to my head and secured. I just hope that an accident doean't damage it and it is there to use if I am able to call.
AND!!! The 1st contact on the phone is I.C.E. WIFE! Everyone should I.C.E. their phone contacts!