Step 1: Find your teenager's motivations for wanting to get organized
Your teenager's disorganization can have effects on all aspects of his life. It could effect his academic performance, finances or even relationships with his friends. Help your teenager find reasons for wanting to be organized.
Step 2: Acknowledge organization no matter where it stems from
No matter how messy and disorganized your teenager might seem, there is undoubtedly an aspect in his life where organization prevails. Acknowledge areas or situations where your teenager is organized and encourage him to apply those skills to the other aspects of his life.
Step 3: Do not deprive your teenager of his belongings
Allow your teenager to sort out what items are important to him and find a suitable place for them. Do not senselessly throw his "stuff" out the door.
Step 4: Reward organizing accomplishments
If your teenager manages to achieve his organization goals, have a reward ready for him. Extending your teenager's curfew or allowing him to commit to an additional activity might be good examples of suitable rewards. It also shows your teenager that you have trust in him.