Quoting TurtleDove9309:" I have a question for autism moms. Please dont be rude. My son is almost 3 and has moderate to high functioning ... [snip!] ... and his therapists tell us he needs discipline just to keep it on a 1 year old level and try to redirect unless its dangerous."
I think the redirection is definitely important.
I have a belief in guidance instead of discipline. So one thing I would suggest would be finding an appropriate substitution for an inappropriate behaviour. If your child is jumping on the couch, invite him to jump on the floor or somewhere more safe with you. If your child is hitting himself find another outlet. First I would try to see if the hitting is for stimulation, or if the hitting only follows discipline and may be his way of further disciplining himself. If it's sensory find a better, safer sensory activity. If it's a response to discipline, maybe explore some hands off discipline techniques, so he does not learn to discipline himself physically.