#2 Lesson learned....stay abreast of what technology has to offer. For example, when purchasing a USB stick, make sure you are NOT purchasing one that requires a memory card unless you have the appropriate memory card for the device.
It is when you decide to transfer photos from your laptop to a portable printer for printing, you discover the USB stick does not work. You then open it and realize it requires a memory card. (Fortunately I had my card reader and downloaded photos from my laptop to my compact flash card which also works on my portable printer.)
#3 Lesson learned....pack plenty of nude-colored unmentionables, which can be worn with any color outfit. It is when you decide to wear white pants and have only black unmentionables that you realize your outfit pre-planning for the trip was shot to hell.
As a result of these lessons learned, I now have a plastic bag dedicated to electronics for travel. It will remain packed with an extra phone charger, a compact flash card reader and a laptop adapter. When I travel, it is ready to go. I hope I remember to pack it!
And I now know there's a difference between a USB stick that requires a memory card and an actual USB stick. Not one of my brightest moments, I'd say.
I now must stock-up on nude-color unmentionables. Why bother with other colors? I'm going to play it safe and travel well.