3 Decor Secrets of Happy Couples

Get a coffee table you won't worry about damaging.

And make sure it's big enough for both of you to put your feet up on at once—there's no domestic harmony when you're fighting for foot space.

Jonathan Adler, home furnishings designer and author of the forthcoming 100 Ways to Happy Chic Your Life, and his husband Simon Doonan, creative ambassador at large for Barneys New York, share their advice for keeping the peace while decorating.