The standard pledge for people in the rationalist sphere trying to make the world a better place is 10% of income to efficient charities, which if you're making the typical kind of money for this site's demographics, is closer to "token" than "difficult and thankless task", even if it's loads more than most people do.

Personally, my own response was to notice how little guilt I felt for not living up to moral obligations and decide I was evil and functionally become an egoist while still thinking of utilitarianism as "the true morality".