This made me smile. My son is ACE at losing things (He's now in his 30's btw). He tends to put something down and get distracted. He has lost numerous Kindles, wallets, phones etc. He even almost left his shoes on a train once, after kicking them off to relax and then almost missing his stop, panicked and went to leave. :D
Something handed down to me I pass on is "Everything has a back to it." Not a front and back but a place to put it back - where it came from. That doesn't help when you're out and about and take off your shoes though LOL.
I like the idea of labelling dates though. I may start that one.
Good post :)