According to Agnipurana Good omens while leaving house are facing white flowers, full vessels, meat, distant sounds, goat, cow, horse, elephant, fire, gold, silver, sword, umbrella, fruits, butter or curd, sugarcane, sound of thunder, lightning, dead body without anybody crying, donkeys braying; buffallo crossing from left to right; horse, cats, donkeys, from right to left; crows near door or with mud, or a dog with meat in mouth and so on. Bad omens are facing cotton, dry grass, cowdung, coal, leather, hair, a lunatic, chandala, widow, ashes, bones, sound of musical instruments, break down of vehicle, fall of umbrella on head, recall back before journey and so on.

According to Agnipurana Good omens while leaving house are facing white flowers, full vessels, meat, distant sounds, goat, cow, horse, elephant, fire, gold, silver, sword, umbrella, fruits, butter or curd, sugarcane, sound of thunder, lightning, dead body without anybody crying, donkeys braying; buffallo crossing from left to right; horse, cats, donkeys, from right to left; crows near door or with mud, or a dog with meat in mouth and so on. Bad omens are facing cotton, dry grass, cowdung, coal, leather, hair, a lunatic, chandala, widow, ashes, bones, sound of musical instruments, break down of vehicle, fall of umbrella on head, recall back before journey and so on.

Omens are the matter of olden days and I don't believe in such omens in modern age.