Right sock, right shoe. Left sock, left shoe. (this was covered brilliantly in an episode of All in the Family)
If there’s even one fly or mosquito in the room, I’ll not rest until it’s dead.
If I’m eating something that’s longer than it is wide (like an omelet, chile relleno or burrito), I have to turn the plate so one of the ends of the item is facing me.
I must sit in a completely darkened room to watch TV. To accomplish this, I have WW2 blackout style curtains installed on the windows in the den.
I also pick up a penny, wherever and whenever.