A simple strategy to try to increase desired behaviors- make it easier to actually do that behavior! Decrease the response effort by arranging things in a way to make it easy to do the expected behavior.
Applied Behavior Analysis is the study of behavior. It is a research-based, proven method for decreasing problem behavior and increasing desired behaviors (aka teaching new skills). Here I am presenting antecedent interventions, or positive behavior supports that are not individualized. If your child needs specific, individualized behavior intervention, please find a BCBA in your area. You can find licensed professionals through the Behavior Analysis Certification Board.