Becoming a monastic and returning to lay life
If everyone can say a good word and do a good deed every day, the efforts combined will amount to the greater good for society as a whole.
The environment we're living in is created by the vows and karma we made in the past lives. We're born in this environment and receive our respective results due to our karma.
Practice means mending our ways. We should constantly observe, examine and train our mind to develop it toward the wholesome.