LTP: Take pictures of the where you've stored your luggage/bags, "with" surroundings. That way you'll have a much easier time finding it. Especially in larger stations around Japan. Saved my ass in Shinjuku this year.

Do this for cars in parking lots too.

LPT

Omg, snap! I didn’t do it again after that. Also for the idea mentioned about taking photos. No camera phones back when I was doing this and it was actually in Japan that I bought my first proper digital camera, the Canon Ixus 3 I think iirc