[Question] What are some quick, easy, repeatable ways to do good?

I’ve found that when I’m down, in a rut, or tired, doing simple acts of good is one way to help me feel better. I occasionally make donations to GiveWell (on top of my monthly donation) or set up blood donation appointments (effective insofar as it comes out of the time I would spend reading at home, but instead read while giving blood). Are there are activities like these that are low effort but have high emotional payoff for me and reasonably high altruistic payoff for others?