Really like the idea of a backpack wall with the chalkboard overtop. This way you can write reminders (when they're old enough to read) so that you don't have to constantly tell them. Erase reminder once done.
Back wall of garage before enter the house? Simple built-ins to create a mudroom or storage anywhere from a kids room to a laundry room by adding shelves or a deeper bench for sitting. Or instead of custom, buy two thrify store bookcases and paint them, bolt them to your wall and add wainscotting between them. Then pick up a thift store bench and cut it to fit. Add the hooks and you're set.
I adore her idea of cutting an old coffee table in half and painting it to use for two end-to end benches in the entry way. I also LOVE her DIY framed numbers for the coat hooks. Initials would also be fun.