Several years ago, Men's Wearhouse founder George Zimmer, told Inc. about his worst mistake—the failed acquisition with a Canadian clothing store that cost his company $25 million. This summer, Zimmer returns to the magazine's pages to help our readers avoid their own catastrophes.

Zimmer started Men's Wearhouse as a single store in a Houston strip mall in 1973, offering designer suits at low prices. The concept caught on, with Zimmer as it's TV pitchman ("You're gonna like the way you look. I guarantee it!"), and the Men's Wearhouse expanded across the country. Today the company, which Zimmer still runs as chairman and CEO, boasts annual sales of $1.9 billion and includes 750 stores. During the past 34 years, Zimmer learned a lot about marketing to men, coaching salespeople, creating a great work environment, and customer service—and he's offered to answer reader questions on any of these topics.

Now is your chance to tap this trove of experience. Send your toughest problems to askinc@inc.com. We'll print the best one—along with Zimmer's response—in our July issue.

(And while you're at it, check out this month's column. Real estate entrepreneur Barbara Corcoran weighs in on the how to get great press.)