I worked on a fishing trawler for some time . No whistling ( whistle up the wind = bad weather . No talking about rabbits
No sharpening knives before shooting the nets
No tying the cod ends before 1st shoot
My favourite .... No going to sea if you saw a nun or a priest before casting off. More time in the pub !

I personally never submit to any superstitions. However, When I was much younger my father told me a story about my grandfather. My grandfather, grandmother and their four sons were out all day and evening doing something( don't know what). They were all very tiered. They owned a cat. The cat started washing itself and my grandfather threw the cat out of the house. Apparently when a cat washes itself it means your going to have company. I can only offer empathy to the cat.

Was taught if you are gifting someone knives you need to put a penny with them. I know that one is cultural (and not my culture). Something about not wishing the person ill. We had a company that makes knives in my Hometown so it came up a few times!

I really haven't got any.

I don't know if it is superstition or common sense but if I have had to return into the house having forgotten something like my wallet or phone, before re-exiting I always count to ten to prevent the haste that causes less speed and to refocuss on what is needed now rather than cuss my prior aberration.

"Silly Superstitions"? Are there any other kinds?

I kiss my hand and smack it on the side of every airplane I fly in as I'm walking into it.

True life story... how I intended to be. My son was a member of the Air Force Honor Guard in Las Vegas. In 2012 he was in the Pacquiao Marquez 4 Fight. He carried and displayed the Mexican Flag into the Ring. The dressing room designated for the Honor Guard was given to rapper 50cent and his entourage so my son ended getting dressed on Manny Pacquiao dressing room, he took pictures with Pacquiao's robe that he displayed to the ring. So to me the reason Pacquiao that never officially lost before or never even knocked down by Marquez was that My son took pacquiao mojo from the robe and passed to the Mexican flag... Marquez took the Mojo from the Mexican flag.... so the end result was Marquez Knocking Out Pacquiao in one of Boxing's great and most devastating knockouts this century if not in history. My superstition story about a sport. This is the whole fight. You can see good image of my son during the american anthem.
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I avoid cracks in the sidewalk , just to be vigilant . I also avoid wishing , & use alternatives instead . I have books on oracle divination studies , as they cross language barriers , & I like the artwork on various Tarot Cards .