If I could offer my fellow white men just one piece of advice from my 55 years, I wouldn't, because I've learned that I know nothing.
But if they insisted, here it is: discomfort won't kill you; in fact, it's trying to teach you something.
I am talking, of course, about those times when someone with less privilege says or does something that makes you uncomfortable. Don't react: just sit with it a while, and think.
That's it. One Weird Trick™ for not being such a douchebag.