4. Select an age appropriate number of resolutions
Practice Perfect, by Doug Lemon, et al., does a fantastic job of breaking down how to make goals attainable. While the book focuses on grown-ups, the same rules apply for kids.

Picking too many goals at one time will result in overload and likely end in little change. Instead, have kids pick just a couple resolutions. Most kids will do best with 2 to 3, but some may enjoy setting more. 

If your child really wants to make a long list of resolutions, let him, but then go back and have him pick 2 to work on the hardest.