"To really succeed on Amazon today, you need to have a moat," says top seller Lisa Harrington.

"I'm trying to build a brand that will be worth quite a bit and have some staying power, and I feel like you do that by solving everyday problems." ...

"I'm laser-focused on brick-and-mortar retail because the Amazon game is a really, really hard one," said entrepreneur Alex ...

Alex Yale owns two seven-figure brands, one that he launched on Amazon and another that he acquired. He has specific advice ...