I worked in Virginia this week, waking up at 6 a.m. each day. Hotel rooms usually have one abstruse alarm clock-radio, and it's usually risky to assume that you how to make it work. So I often ask the desk clerk for a wakeup call. Most hotels now automate "personal" wakeup calls. I trust their computer to call me on time, more than a hotel clerk. Unless the computer is down, of course.
But in this case, I was able to set a cascade of alarms. My cell phone has three alarms. I had brought an alarm clock. I also used two alarms on my watch, and that hotel clock-radio. I set them up as I do at home when I need to wake at 4:20 a.m. (to turn on the radio station at 6): starting with the quietest alarm, working, in intervals of two minutes, to the loudest. Then I thought: I'm being silly!
At home, my goal is to wake up early without waking my wife. Alone in a hotel room, my goal should just be to wake up. So I set all the alarms for 6, 6:01 and 6:02, and their avalanche of sound woke me very nicely, thank you.