Fight the fights that are worth fighting. Don’t fight just to fight, and don’t put yourself out there for something that’s not worth it. This applies to everything in life – business, friends, family. With friends and family, very often there is something that you kind of want but the other person really wants. You want the living room to be organized in a certain way and the other person wants it completely different. If you don’t care that much, then it’s a fight that’s not worth fighting. If you care strongly about something then you should advocate for it. But if you don’t care, and it’s better to preserve the relationship then let the other person win.
