On my tablet I would turn off the wifi and put it in sleep mode. My readers I would simply put in sleep mode. But not because I'm asked, but rather because I know I won't be able to read anyway... If I'm near a window, I'll be plastered to it, if I'm not I'd be trying to get to see as much as possible
Flying is not something I do regularly, so, I'm always excited during take-off and landing...
The last time, the flight attendant asked me to turn off my photocamera. Needless to say (as I was sitting next to a window), I turned it off, only to turn it back one the moment her back was turned. I wanted to record our taking off!