The idea of giving difficult feedback as soon as possible after an incident is deeply ingrained, but sometimes it's better to calm down first, says Harvard Business Review.
Your input will be far more effective, and better received, if you aren't feeling agitated. Put some distance between the offending action and the feedback to gain perspective. You may need to calm down over several days.
This will give you time to prepare, consider the other's point of view, and deliver the message in a calm and helpful way.
This management tip was adapted from the book Guide to Giving Effective Feedback.