I unplug the laptop, work on battery and wireless internet. With the desktop, everything, printer, scanner, monitor etc. is plugged into a power strip and I just pull the one plug. As Lupin says, I do the same with the telly and stereo too. Power strips make it much easier.
During the wet here, there are serious lightning storms every day so I just do it as a matter of course when I leave the house at 1, the storms don’t usually start until later in the afternoon.
Better safe than sorry.