How do you keep someone from entering your home?

21 year old step-daughter came today to remove her things (all of which were boxed for her) and when she was done removing her stuff she insisted a tv left upstairs was hers. It was not hers. She became enraged and pushed herself into my house although I was standing in the doorway repeatedly asking her to leave. She was verbally abusive as well. She did eventually walk out the front door but this is not the first time she has entered my home without permission. I am in New York and I don't think this is a serious enough offense to obtain a court order of protection, however, how can I legally keep her from entering my home? She does not have a key. She is a very troubled young woman and when she has a hissy fit everybody runs and does whatever she says. She pushed herself into my home and I would just like to make sure she never does this again. Suggestions? None of her things remain here and we brought the tv outside just to shut her up! How do I keep her from coming back?