I had a boss who used the expression “Pennies become dollars.” It wasn’t that he was particularly miserly, it was that he felt that if you saved money on little things, it would add up to big savings over time.
I am not sure I agree with that statement totally, in that sometimes if you focus on little things, you sometimes miss the bigger opportunities. I generally go with “Don’t sweat the small stuff” as a favorite saying.
That said, pennies can add up to dollars in the right circumstances. If you don’t miss the big picture, focusing on each small transaction can save you money.