O is Organised.
Help your child become organised: know where stuff is, anticipate, be able to plan. Why? Because employers crave those skills and will test for them. Children don't need to be as planned and as organised as once they did. The flexibility of the mobile phone and texting has allowed fluidity into agreements coupled with it is often not seen as 'cool' to be too rigorous on any subject. This means children get little early training with these skills.
A great place to start is exam revision. It needs a goal, it needs a plan, it needs anticipation and if it is started early enough, it works. Which will of course reinforce the skill.
Get organised.