I was walking a house with a customer, we walked the entire house looking at paths for retrofitting whole house audio. As we were standing by the door to leave she asked if I saw any issues with the job. I said " No but one of the candle overlays in your row of chandeliers is upside, If you give me just a minute I will run to my van, grab a ladder and fix it." She laughed and said she had lived in the house 20 years and had never noticed or had that pointed out to her. It was a tiny detail in probably 10 chandeliers with 20 or so of those candle overlays on it. I noticed it like the second I walked in the house and had thought about it the entire walk through.
I also turn all the labels the same way when I put drinks/beer in the fridge and all the grocery's have to to be label facing out and fronted on the shelf when I put them away. I will only leave a flat head screw straight up and down when I put it in, even if it means it has to be over tight, or a little loose and I can't stand seeing numbers on my phone screen. No matter how busy I am , I have to clear the voice mail/Email/Text apps. I am also just one pocket away from carrying a level with me everywhere I go. Not because I can't see it, but because sometimes I have to prove it to be allowed to fix it.