Hi Nory,
I think you are doing everything right. You just need to stay your course.
And by all means, do not model UNDESIREABLE behavior by hitting back. While it may work in the short term to get your child to stop, it will leave long-term ramifications. Kids need to learn to behave with good manners because it is the right thing to do--not because they are afraid of the consequences.
Kids learn what is acceptable by watching others, especially their parents. You cannot teach a child not to do something by basically saying, "You are not supposed to hit, but I'm going to hit you to teach you not to hit." Sorry, but I don't think the authors of the Bible were educated in Early Childhood Development. If hitting is not okay, then it should never be okay, no matter who is doing it.
Unfortunately, toddlers are going to hit. Some more than others. And, you don't have to resort to punitive action, either. . It takes over 100 times for a toddler to actually "program" a message into his head.
Just stick to your course of action (I.e. saying, "Hitting is not okay with me. Hitting is hurtful and you are not allowed to touch my body that way." And then gently take the object away or gently grab his hands and model the type of behavior that you would like. For example, use his hand to stroke your arm gently and say, "This is the way you CAN use your hands to touch my body."
It is always best to redirect to positive behaviors. If he's using a sippy cup to hit, just remind him that cups are not for hitting, but they ARE for drinking. I used to tell my daughter (now 2 1/2) that hands are not for hitting and then I would ask her to tell me other ways she can positively use her hands (for clapping, for waving, etc.).
For the record, my daughter still hits from time to time, even though her language skills are fantastic. I just still remind her that hands are not for hitting and hitting hurts.
It's tough being a toddler--It's good to be reminded of that from time to time.
As for the patience thing, I started saying to my daughter: "Let's both relax and take a deep breath and count to ten" Her teacher at school actually saw her saying that to her friends one day. They DO listen!
if you have time to read, I highly recommend the book Kids are Worth It! by Barbara Coloroso. I also recommend, Positive Discipline by Dr. Jane Nelsen. They have been invaluable to me in my quest for a positive parenting experience.
Best of luck to you! You are NOT alone!!