There's nothing more frustrating than finding yourself without the proper cords for one's electronic devices.
First as I'm packing to come to Dinuba I find myself without my camera battery charger (and I'm pretty sure I left it in Vienna).
Second as I'm in the car on the five hour drive to Fresno I find that I didn't bring my iPod cord...now I have to look forward to another five hour drive without music. Or worse, five hours of listening to ESPN...
And lastly, as I watch my laptop die last night, I realize that my power cord is still on the floor of my living room. Good thing Dad brought his laptop.