One of the biggest impacts on my life recently was adding an automation for my smart lights (Philips Hue) in the living room.
The lights start dimming over a span of 2 hours until they are their minimum at 22:00.
The result is that it just feels like it is time to go to bed. I have always struggled with getting plenty of sleep and not staying up too late and this has had a tremendous effect the past two months.