Home Automation. It can be as simple as buying a hub and some devices. But, I went the self-hosted route using Home Assistant to give me more control of what it can do.
I have some automations that turn on a certain set of lights on when the sun sets and off when it rises. It’s pretty simple, but saves electricity because I used to leave my front porch light on 24/7.
I just set up an automation last night that sends me a discord notification when the laundry machine finishes and the same for the dryer. I can’t hear the beeping because I am always too far from the laundry room. This one has me so excited!
I’ve seen people automate gardens which seems really neat. Really, your only limit is your imagination. I also just really like having an app on my phone to toggle power to random lights and fans around my house. It helps me get out of bed because I can turn the fan off when I’m cold in bed.