Bad Luck 1: Walking under a ladder - A leaning ladder forms a triangle with the wall and ground. Triangles represent the Holy Trinity, and violating the Trinity by breaking it (walking through it) would put you in league with the devil himself.
Bad Luck 2: Black Cats - In ancient Egypt, the Goddess Bast was a black, female cat. Christians, wanting to rid society of all traces of other religions, convinced the ignorant that black cats were demons in disguise and should thus be destroyed. In the process, they also destroyed the kindly ladies who cared for the cats, believing them to be witches. Being demons, a black cat crossing your path would create a barrier of evil, cutting you off from God and blocking the entrance to heaven.
Bad Luck 3: Spilling Salt - Salt used to be an expensive commodity used mainly for medicinal purposes. For this reason, spillage was to be avoided at all costs. The idea that it is unlucky to do so probably stems from the belief that Judas spilt salt during the last supper. Throwing spilt salt over the left shoulder is linked to its medicinal use. If it could not be administered, the next best thing was to throw it into the eye of the evil spirits that brought sickness upon us. These spirits were thought to lurk behind your shoulder, waiting for an opportunity to strike.
Bad Luck 4: A bat flying into the house
Bad Luck 5: An owl hooting 3 times
Bad Luck 6: 3 butterflies together
Bad Luck 7: Looking at the new moon over your left shoulder
Bad Luck 8: A 5-leaf clover
Bad Luck 9: Breaking a glass while proposing a toast
Bad Luck 10: Putting a shirt on inside out
Bad Luck 11: Red and white flowers together
Bad Luck 12: Hearing a rooster crow at night
Bad Luck 13: Cutting your nails on a Friday
Bad Luck 14: Putting a hat on a bed
Bad Luck 15: Getting out of bed left foot first
Bad Luck 16: Violets blooming out of season
Bad Luck 17: A picture falling
Bad Luck 18: Breaking a mirror
Bad Luck 19 : Singing before breakfast
Bad Luck 20: Opening an umbrella indoors
Bad Luck 21: Giving away a wedding present
Bad Luck 22: Stepping on cracks in the sidewalk
Bad Luck 23: An itch inside your nose
Bad Luck 24: Crossed knives
Bad Luck 25: seeing an owl during daylight
Bad Luck 26: If a dog suddenly barks for no apparent reason in a house that has a sick person then
Bad Luck 27: There will be an argument if knifes are crossed at a table. Also, if a lover gives you a
Bad Luck 28: Breaking a mirror means 7 years of bad luck, unless you take the pieces outside & bury them in moonlight. Also, an undisturbed mirror in a house suddenly fall & smashes then it means that there will soon be a death.
Bad Luck 29: Unless you were born in October, the wearing of an Opal will be ill-fated
Bad Luck 30: If pepper is spilt, then you will have a serious argument with a friend.
Bad Luck 31: Sparrows are said to carry the souls of the deceased to the after-life. To kill one means that you will be cursed.
Bad Luck 32: It is extremely unlucky to open an umbrella inside a house.
Bad Luck 33: If a groom drops the ring during the ceremony then the marriage is doomed to failure.
Bad Luck 34: Breaking a plate, especially if it had not already been cracked.
Bad Luck 35: To see the new moon for the first time through glass. Upon seeing the new moon you should turn whatever silver you have in your pockets or handbag, and thus ensure prosperity for a month.
Bad Luck 36: To upset pepper
Bad Luck 37: The blossom must never be cut from the tree and brought into the house before May 1, or ill fortune will attend you.
Bad Luck 38: Never mend a garment while you are wearing it, or misfortune will follow.
Bad Luck 39: Breaking a mirror portends seven years of bad luck. It is also extremely unlucky to receive a mirror as a present
Bad Luck 40: To make a present of a knife or any other sharp instrument unless you receive something in exchange.
Bad Luck 41: Walking under a ladder, unless you cross their fingers while doing so.
Bad Luck 42: It brings ill fortune if a lease or any contract is signed in the months of April, July, or November.
Bad Luck 43: To spill ink threatens worry, annoyance, and the failure of a project that is on foot.
Bad Luck 44: Crossing two table-knives by accident portends bad luck.
Bad Luck 45: To give a pair of gloves to a friend unless you receive something in exchange.
Bad Luck 46: To encounter a gravedigger coming towards you. Usually this means there will be a severe illness.
Bad Luck 47: For those who completely rake out a fire before retiring. A few embers should always be left.
Bad Luck 48: To break a glass bottle portends misfortune
Bad Luck 49: If you fasten a button into the wrong buttonhole
Bad Luck 50: if a candle falls over
Bad Luck 51: For a golfer to borrow your partners umbrella
Bad Luck 52: Throwing stones into the sea cause bad luck
Bad Luck 53: Starting a cruise on a Friday
Bad Luck 54: Stepping on board a ship with your left foot
Bad Luck 55: To open an umbrella in the house
Bad Luck 56: It is unlucky to sit on a table unless one foot is touching the ground
Bad Luck 57: If a person stumbles when leaving his house at the beginning of a journey, or trips or stumbles more than once during the course of the journey, it is advisable to postpone it.
Bad Luck 58: To pass anyone on the staircase.
Bad Luck 59: New shoes should never be left on a table
Bad Luck 60: To put on the left shoe before the right, and it is worse still to put the right shoe on the left foot, or vice versa.
Bad Luck 61: Spilling salt. If both salt and pepper are spilt at the same time, the force of this ill omen is doubled.
Bad Luck 62: Reading this thread by University of Crappology