Did you know that Harvard Business School researchers found that among a group of surgeons learning a new operating technique, those who discussed each case in detail and debriefed with team members after procedures managed to halve their operating time … while those who didn’t discuss and debrief hardly improved their time at all?
People don't debrief enough after a project is over, particularly when a high workload makes you harried. But as that study shows, there's real value in it. Even when things have gone well on a project, both you've likely learned from the experience and picked out things that could be done differently next time to get even better results. Writing those up, even as just a quick bulleted list, can be an invaluable resource to have on hand the next time you conduct a similar project.
One small step that can help you do this is to build a brief reflection meeting into your schedule when you're scheduling out a project. If you have it on your calendar as part of the project steps, you're more likely to do it.