What “little things” do you do that really add up?

Bonus points if you include the numbers! I’m thinking really small insignificant things that you do that add up. I thought of this question while thinking about how I refuse to pay for 12 cent bags at Aldi. I keep reusable bags in my car, and if I forget one then I will just throw things in my trunk and grab a bag from the house to carry everything in. If I don’t buy bags each week, I save a little less than $19 a year (12 cents per bag x 3 bags a week, 52 weeks per year). Seems insignificant, but it adds up…