E.M.
I have two girls ages 1 and 3. We use Love and Logic with them and it has worked great!! Complete change in their behavior (espeically my 3 year old, we're just starting it with my 1 year old). We used time outs, rewards and sticker charts but non of it really worked well for her. Check out www.loveandlogic.com and specifically look for the book "Love and Logic Magic for Early Childhood" there are tons of resouces on that website. The idea behind Love and Logic is to teach your kids responsibility for their actions (best thing from there that I've used is the "enforceable statements" wow, huge change in my daughter's behavior). Hope this helps!