Rearview mirror at the top of my 52" curved widescreen monitor. I work at home in limited space with family around and there's always activity behind me, doors opening, etc. I also work with noise cancelling headphones. Hard to explain why, but the mirror stops my constant need to turn around to figure out what's happening. It took me a minute to hang, with fishing line and zip-ties. Way less cognitive overhead and fewer self-made interruptions since implementing this. $13
- https://www.amazon.com/dp/B08MFD7BT7
I've got a simple bike rear-view mirror, like $10 off of amazon. has a clip on thing, fits fine on my monitor stand.
Same goal -- I've got big ear covering headphones w/ noise cancelling, so you feel crazy isolated and it's hard to tell if/when people, my kids, the dog, etc. is around until basically they're on top of you.
