I overclocked my Visor Prism which I believe led to it's untimely demise.

I once used my old Zaurus SL-5500 at the beach and now it has sand under the touch screen...but it still works fine!

I sent my newer Zaurus SL-C1000 skipping across the blacktop once when it was brand new while trying to get it out of my pocket. I think it ejected the SD card and battery but it still works fine. (It's currently sitting next to me booted into Debian. )

The worst thing I did, though, was kill a neat little ultraportable P133 (old, but cool) by taking it apart to install linux onto it's HD on another computer and breaking the plastic clasp on it's LCD ribbon cable. Then I kind of just pushed the cable back into place and fired it up. Result: sparks, broken screen, total loss. I have no luck fiddling with small electronics. :/