Caused some hurt? Say sorry immediately.

If you stuff up, apologise straight away. Doing this will remove half of the hurt caused.

Why?

Because you'll stop the other person from having to sit there, for an extra 5 minutes, 2 hours, or a day, feeling terrible, anxious, and sad because of your actions.

It shows that you're aware that what you said/did was crappy - that such crap is not typical of you.

Also, by saying sorry straight away, they'll have less time to reflect on other examples of  your poor behaviour, subsequently becoming more and more upset with you as time moves on.

So apologise straight away. As soon as you stuff up.

Makes sense right?