Learn them. Know them. Know what pain using them causes and why.
It’s the very least you can do.
Here’s a hint: If you’ve ever said, “I don’t care if you’re white, black, yellow, or purple,” you might be a racist.
Kareem Abdul-Jabbar is awesome and one of my favourite writers on HuffPo. You should really read his not often enough postings there, but only after you read the above link.
ETA: No one told me about the WEEKLY columns at the LA Register. I’m on it now.