#4 - In Their Backpack
Backpacks with lots of compartments can help kids remember where everything goes. With a little time, they'll know in a snap where to fish for pens and paper. You'll also want to make sure they're only hauling around items they really need. Too much clutter gets heavy in a hurry.
It's also a good idea to get them in the habit of putting all the homework and other stuff they'll need at school the next day into their backpacks before it's time for bed. That way you and the kids can avoid a morning scuffle to get everything together in time to make it to the bus stop.