Neil Patrick Harris' better half, David Burtka, is back to co-host with Rachael, and he's making his kids' favorite: Chicken Tot Pie! Then, Instagram influencer Hannah Bronfman (with over 500K followers!) is breaking down her tricks for looking younger and having more energy. (Celery juice, anyone?) And "Shark Tank's" Barbara Corcoran is answering her most-asked career questions. Meanwhile, it's taco night for Rach!

Today we're talking "Rules to Live By!" Clinton Kelly covers etiquette for everything from fashion to posting photos on social media. Then, the "Cake Boss" Buddy Valastro shows who's boss with baking basics (while demo-ing a Baked Alaska!), and Carter Oosterhouse talks renovation rules. (Which home improvements add the most value? He answers!) Plus, Rach is making her "Put a Ring on It" Pasta Bake!