This advice works in a surprisingly wide variety of situations. It's good to stick to principles and say "hell no!", but sometimes it's not worth a fight. It doesn't work with taxes, but certain problems just go away if you ignore it.

In situations like this, I put it on my long-term to-do list to get it off my mind. In a remarkable number of cases, I get to cross it off my list months later without having had any arguments.