RELATED: Sheryl Sandberg 30 years sadder and wiser following husband's death
Sandberg is candid about her heartbreak and isolation after the sudden death of her husband Dave Goldberg. It's that candor you'll find in her new book "Option B."
"So often we don't know what to say or what to do," Sandberg said.
FULL VIDEO: Sheryl Sandberg talks grief, recovery in new 'Option B' book
Sandberg says "Option B" is a guidebook not just for the person dealing with tragedy, but also for everyone rallying around that person. "Resilience is not something we have a fixed amount of, it's a muscle," she told ABC7 News. "And we can build it by helping each other find joy."
RELATED: Facebook executive Sandberg urges graduates to build resilience
She says the best way to help -- don't ask, just do any act of kindness, no matter how small.
Meanwhile, Sandberg hopes the book will inspire "Option B" support groups on Facebook and through OptionB.org.
"And if I do that, I think it honors the life he led," Sandberg added.
She says her loss has made her more grateful. "I will never make another joke about growing old again because it is a gift."
Click here for more stories, photos, and video on Facebook COO Sheryl Sandberg.