You can encourage your child to obey by acknowledging his emotions and intent. Get down to his eye level and calmly but firmly explain what needs to be done. Explain the reason why, and even give parent-approved choices of how to do so. Guide him so he has help, and follow through with consequences if he continues to disregard you. And lastly, praise him when he does what he’s supposed to. All those moments of positive reinforcement are much more effective in the long run.