Omens

 Sefer Chasidim (59) For there was no enchantment in Jacob and we are not to look for omens. Due to our current sinful state,,there are many Jews that utilize charms and omens. For example they are mindful not to eat eggs Saturday night after Shabbos and not to take fire twice when there is a sick person in the house or a new mother within 9 days of giving birth.  They also are involved in divination. When they see fire and burning coals standing, they say we will have a guest, if you extinguish it with water, they say the the guest will fall into the water. They are violating a number of Torah commandments.  The only omens that are permitted is that which our Sages have permitted such as the signs on Rosh HaShanna. People say  not to start teaching a child or begin any mitzva until Rosh Chodesh. While this is not divination it is improper since no one knows whether he will die before Rosh Chodesh and thus miss doing the mitzva. The rule is always to do the mitzva as soon as it is available.