Longtime HGTV designer Hilary Farr doesn't shy away from difficult clients. Instead, she steps right into dysfunctional homes that challenge the relationships and emotional well-being of their dwellers. From redecorating a boring space for indecisive homeowners to planning major renovations for strained couples, she powers through the tough stuff on Tough Love With Hilary Farr. Ahead: her best tips for couples navigating challenging home renovations.