Another rule of good conversation/social skills I was taught: Only give someone a criticism if it's something that they themselves can fix within 30 seconds.

Another rule of good conversation/social skills I was taught: Only give someone a criticism if it's something that they themselves can fix within 30 seconds. For example, let someone know that there's something in their teeth, their bag is partially unzipped, or they're too close to a 'wet paint' sign. But DON'T tell someone that they have a hole in their sweater, their hair is really messed up, they are wrong about some choice they made from a personal story that they just finished. Of course there is additional nuance like nothing graphic/sexual. And it's ok to offer to help the person fix the thing, but don't simply do it yourself without first getting consent. Context is key but the rule of 30seconds is a good one.