i have 2 years old twins.. how should i discipline them

My kids, Audrey (3yrs) and Harrison (18mos) will sometimes run around yelling and screaming. I've been setting boundaries and disciplining them since they were each about 6 months old, so they're usually pretty agood about listening to me. I tell them to stop, that they're being too loud, and they usually stop. If they don't they get sent to their rooms which they don't like, even though their rooms are full of toys.

For kids this age time outs are usually best. (I also get down on their level, loko them in the eye and tell them to stop. Getting in their face a little shows them that I'm actually serious.) They don't really understand what taking away a privilege means. Spanking of any kind isn't good, it just encourages them to hit, especially when they don't like what is going on. I don't give my kids an "or else" option, I just tell them to stop. Sometimes it takes a few tries on my part, but they usually get it and stop as long as I'm consistent.