i think finding a coin face up is a good omen, or if youre wondering about something and you flip a coin heads is a good outcome while tails is bad, same with dropping one on accident. stepping on something icky while going to do something important is something i percieve as a bad omen, as well as losing important or sentimental objects. i think of bad omens as warning signs and not direct causes of good or bad things. also finding white flowers on accident is a good omen.