Can you tell me what you mean by "problematic"?
If you are concerned about behaviors such as in my hub about behavior disorders, the biggest thing that I can say is that you must be firm and consistent in what your expectations are. If your child doesn't know what you are expecting, they won't know how they should be behaving. It is important that you talk to you child about these issues if they are coming up.
Another important thing you can do for children is to have them follow a known schedule. This allows the child to know what is next, even if all they know is that they do activity #1 and then they do activity #2. The structure that having a schedule in place can provide to all children, but especially to children with behavior disorders, gives the child a level of comfort.
If you want to ask about certain behaviors or want some more specific ideas, just let me know.