It’s not just a memory tool trying to be clever while brainwashing young kids. It’s also a great strategy for life. Reduce your work by reusing and recycling it. Because I saved emails and organized my folders I found training guides that provided all the content I need to plan the next couple months of training. My boss asked me to put together some way to track my learning and these guides do most of the work for me. It also let me get on with the learning and not spend more time on the planning than necessary.