You don't have to be more careful with it than with any other electrical device.
Switching it on and off puts the most stress on the electronics, but who would switch such a device on and off every minute?
Leaving it on all the time has a minimal wear on some electronic components, but devices can still last 5, 10 or 20 years.
Just don't make it too complicated. Just turn it off when you think you won't use it for >1-2h or whatever, in current times everybody wants to save energy because of higher prices for energy.
But I would recommend you to use a power strip with surge protection and mains filter.
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