I was going to answer with only one task (chore) and that is working to make a living.
Everything else I do is good for health, humility, compassion and generosity.
But then I realized that so is working to make a living. I thought I'd instead spend my time writing, painting and creating software. But these would only be valuable if other people found them to be valuable, so I'd end up making money off of them, if they were worthwhile actions. So, then I realized that I need not do something that wasn't worthwhile. So, if I want to write, paint and create software, I need to do a better job of it so that those actions are not selfish.