Assign a smart switch at the entrance and just shut down the home by pressing the switch before you leave for work. Before going to sleep, just tell your Voice Controller* to "Turn off everything". No need to scramble around the house to check for on switches anymore.
Here is how it can all be easily done with Home-A-Genius :
Create a Scene like the above to turn off all your smart switches, smart bulb and etc with a Quick Button, Voice Controller* and a Wireless Smart Switch (near the entrance)
Detailed View of the Wireless Smart Switch as a Condition
Note: The button "on" action should be set to switch off all devices
Detailed View of the Voice Controller* as a Condition