Turning 4 - rage over so many things

My Son is Turning 4. I am an OT and have worked extensively with behavioral kids. My son is very rigid and tantrums with violence to himself, the walls/floors, me, or his sister. I am extremely consistent with behavior programs - it works against me at times but has also helped with the behaviors. I find I struggle with offering situations that will ease him through the day instead of punishing the fits, but when I able to find the energy to think and act ahead many issues can be avoided.... I need to somehow find the strength/energy to do this more constantly. So those are my insights and goals for myself.