Recently, I have been technically inept with two different devices. In both cases, it was a failure to locate the "on" button.
I guess you have to learn to laugh at yourself, eh? In the future, I'll look for an on button more regularly... That, or continue to be technically inept!
Today: I'm thankful for devices that don't require an "on" button. Pillows, Sheets, Dresser drawers, kitchen cabinets...