I think one of the most important things for kids to learn is what their learning style is (are they auditory learners, visual learners, or tactile/kinesthetic learners, or a combination?). I believe that a lot of kids fall through the cracks in school because they're not being taught in a way that utilizes their own learning style. I teach a college course that has students learn about their styles and tips to maximize their potential (along with tips of how to work with people of other styles). I've lost count of how many of my students (the majority of whom are returning to college after 4-20 years away from the classroom) have said that they wish they had learned this in high school, because they would have done better. I'd be willing to be that a lot of procrastination is a learned behavior as a result of being frustrated with learning.

Check out http://agelesslearner.com/assess/learningstyle.html for the same questionnaire that's in the book the class uses (Learn More Now by Marcia Conner).