We’ve talked about this before and before and before. (Oh … and before.) And we’re going to talk about it again today. That’s how important recruiting young professionals is to your business.

Today’s lesson comes from Fortune’s Nadira A. Hira. In an article titled “Attracting the twentysomething worker,” Hira offers a primer for employers who are wondering what makes their Generation Y workers tick.

“They’re ambitious, they’re demanding and they question everything, so if there isn’t a good reason for that long commute or late night, don’t expect them to do it,” Hira writes. “When it comes to loyalty, the companies they work for are last on their list — behind their families, their friends, their communities, their co-workers and, of course, themselves.

“But there are a whole lot of them,” Hira continues. “And as the baby-boomers begin to retire, triggering a ballyhooed worker shortage, businesses are realizing that they may have no choice but to accommodate these curious Gen Y creatures.”

Using case studies, Hira examines the unique challenges the workforce’s newest generation brings to the office, and how some companies are rising to meet the challenge.

Take KPMG, for instance. According to Hira, the firm gives employees time off to do community service and is sending 100 new hires to Madrid this summer for training. The result? Turnover is down 7 percent since 2002. Says Manny Fernandez, the firm’s head of campus recruiting:  “We’ve got to build tools that are not just about retention but about having people develop skills faster, so that they can take on larger opportunities.”

What are you doing to attract this unique generation of workers? Click “Comments” below and tell us what has worked for you … and what hasn’t.

• UPDATE: National Public Radio has produced a related report titled “Firms Hire Consultants to Handle Needy Workers.” Listen to the report here.