Green was considered very unlucky in my mum's family (long story, but based on experiences!) and I feel uncomfortable wearing or buying green things (unless no choice). But I haven't imposed that on the next generations.
No shoes on the table (hygiene?), salt over the shoulder, don't open umbrellas indoors, don't walk under a ladder (safer not to, anyway).
What's one health habit you've started that's actually made a difference?
