How did hinduism affect the way ancient indians lived day to day?

1. It further established the already existing caste system. With the belief of being born in their caste is because of committing bad deeds in one's previous life. 

2. Supporting the first point, Hinduism's belief of karma also puts forward that anything you do whether good or bad, will come back to you. This makes people conscious of their actions.

3. Another one is that it teaches to respect all living, believing everything is God's children. (rats, cows, and the likes)

Set social structure

Hinduism's belief of reincarnation sets a caste system which impacted the social lives of Indians. Each caste had set norms such as jobs they can work and who they could marry. Marriage was arranged within a caste and families were required to provide a dowry which was also a Hindu tradition. Those at the highest point of the caste system were priests and at the lowest were the outcasts and considered cursed.