Well, first of all, give yourself a break- you're probably exhausted from not getting much sleep because of the new baby, plus running after your 3 year old. One suggestion for you- give your daughter "quiet time" every day for a hour and a half or so. Call it quiet time, not nap time, and let her sit in her room and read her books until you tell her she can come out. That way, if she's tired enough, she'll get a nap in, but either way, you'll both get some downtime. I've been doing that with my daughter since she was about 3 1/2, and it works very well. She knows she can come out to go to the bathroom, but otherwise has to stay in her room. Sometimes she isn't keen on quiet time, but I think we both need it! Your daughter sounds like my daughter! She has said the same thing- "Nothing naughty". I think besides the quiet time, the biggest things you can do are to help involve her in your activities- like big sister helping the baby- getting a diaper for you, or wipes, or picking a toy for him, etc., and helping you with some of your "chores"- like throwing the laundry in the dryer, helping to put the silverware (minus the knives) in the drawer, helping to set the table, whatever is age appropriate. She'll feel like such a big girl, and she'll get extra quality time with you. As long as you make it fun and seem like a privilege, she'll probably eat it up. You get a helper, she gets to feel good about herself and gets Mommy time, and she stays out of trouble. Win-win! Also, just make sure that you are spending quality time with her- just her. I know that when my daughter doesn't feel like she's getting enough attention, she acts out. Hope that helps! Good luck and congrats on your little one!