I flipped through a book at the library the other day, Where's my stuff? http://www.amazon.com/Wheres-My-Stu...f=sr_1_10?ie=UTF8&qid=1333650105&sr=8-10

It started off by having the kid identify his weakness and why it was a weakness, and then offered specific paths to address it. I recall one of the things in there was the issue of carrying the 25 pound backpack for fear of forgetting something.