Don't go to sleep with wet hair or you will get headaches for the rest of your life.
If you get caught in the rain, wash your hair right away or you will get lice.
In our house, it might be the hottest day in July but, if you went to bed with wet hair, you'd catch a cold.
You never bathed or washed your hair when you had a cold. Obeying that one just added to the misery.
Also, a woman should never sit on anything cold. That will cause 'pneumonia of the (ahem)'. Or at least constipation.
Wearing rubber boots in the house will cause problems with your eyes. I have no idea where that one came from.
An open umbrella in the house is bad luck.
When you remark on the beauty of a bride or a baby you must always add, 'God bless her' or 'God love him'. Not to do so is to invite the attention of unpleasant spirits. I believe this one's originally Irish.
My, we did grow up in an odd world, didn't we?