Hitting is actually developmentally appropriate for this age group. My daughter hits and we put her in time out for the offense. We also talk about more socially suitable ways for her to display her anger and put a lot of emphasis on choosing good behavior over inappropriate behavior and the difference between them. She is almost two and a half and before we go and play with other kids I remind her that only good behavior is acceptable and we won't be able to play with other kids if she hits. She also gets reminders when I see her getting angry, and I attempt to validate her feelings. She also gets a lot of positive feedback when she doesn't hit in situations that sometimes bring hitting... Best of luck to you!