# Observe and listen to all these words that I command you

"Carefully listen to and obey everything that I am commanding you"

# that it may go well with you and with your children after you

"that you and your descendants may prosper" 

# when you do what is good and right

"when you do what is right" 

# what is good and right in the eyes of Yahweh

"what is good and right in Yahweh's judgment" or "what Yahweh considers to be good and right"