The books "Smart, But Scattered" and "Late, Lost, and Unprepared" have some helpful information and advice on developing executive function skills.
In our expereince, The Nurtured Heart Approach found in the "Transforming the Difficult Child Workbook" is a good approach to combine with some of the suggestions in the two books above so that your child regains a sense of himself as being lovable and capable. We haven't had much luck with using punitive measures as consequences in learning executive functioning. In our experience, the anxiety that goes along with fear of punishment just makes it harder to for our son to remember things and organize his thoughts and belongings. Rewards and praise for small improvements have been much more helpful. Electronics such as Outlook, phone calendars with alarms and note lists, printed daily schedules, and other ways of externalizing these memory and organizational functions have been essential.
