Here is our prep:
Turn on alarm with online access and text alerts.
Set thermostat to desired temp for the season to reduce costs.
Turn off water and water heater.
Set up as many bills as possible to pay online.
Have yard mowing service.
Have relative or neighbor check house and pick up mail.
We do not turn off cable or other services. Haven't really thought about it.
One thing we hate is on Springtime trips, we come back to a yard full of weeds so it would be nice if the lawn service took care of that.
Plants will also be dead unless someone waters them.