Melissa Joan Hart is a busy mom of three, but she doesn't let that stop her from making time for herself.

The "Melissa and Joey" star, who recently lost an impressive 40 pounds, said in order to take care of her kids, she needs to take care of herself first.

"Making sure that I take care of myself is important because I want to show to my kids that putting yourself first should be a priority," she said in a video for Nutrisystem.

The 38-year-old told FOX411 last May that she finally had her "aha" moment when she decided to get back to work.

"I was getting older and not wanting to take the time to take it off. I just made the decision to do it."

Her motto? "I say, work hard, play hard, sleep hard. Those are my rules and take care of yourself."