Superstitions: They're present in almost every part of the world. I'm gonna list a few I am VERY familiar with below. :p
1. Give a pregnant woman everything she wants
I often hear that if when a woman is pregnant NEVER refuse to give her things she wants (it can be anything; a pet/candies/etc....) or the baby will get a noticeable birthmark with a close shape to what she wanted (but didn't get)once he/she will be born.
2. Removing evil eye
By burning onion peeling with dry red chili wrapped in old newspaper.
Take a pinch of salt and turn it 7 times around a person before that person leaves the house.
4. The black cat
If someone is walking someone or even if that person is driving and sees a black cat crossing the street...the person will have to spit because the black cat is a sign of bad luck.
5. Hair falling out
When you're brushing your hair don't throw away the lost hair; instead tie them together and put it in the stem of a banana tree (its said to reduce hair loss).
6. "Knock on Wood"
I am sure A LOT of you are familiar with this one lol..in order something bad from happening
7. When cutting hair...either:
cut/trim it during full moon for healthier hair growth
make a pregnant woman cut/trim your hair (but it has to be at the beginning/middle phase of her pregnancy not at the end)...it is said to promote healthier hair
8. Dreaming of fish
If someone dreams of fish...it means either the person (if a woman) will get pregnant in a near future OR someone in the family IS pregnant.
The ones I've listed above are a very few i know (there's way too much LOL).
GAGers what are the ones you're familiar with? or you often hear about?