I have been giving 10% of everything I earn for a few years now. Now that I have an accountant (Dougs by the way https://www.dougs.fr?r=6YslpKWpzn), it is even easier.
Giving 10% of our money to people who need it or who we admire
Giving 10% without any reason apart our intuition
Giving 10% because most of religions command to do so anyway and it makes so much sense
When I gave to the Children charity of Elie Wiesel in France https://www.ose-france.org/enfance/maison-denfants-et-foyer-pour-adolescents/elie-wiesel/ there was a beautiful quote displayed:
“The one who gives must never remember it. The one who receives must never forget it.”