Get your hiring managers involved and committed. Hiring managers must take the lead role. They must clearly understand real job needs and be willing to spend time conducting exploratory meetings and in-depth interviews and know how to recruit and close, not just sell and charm.
While a case can be made that retention is now as important as hiring, you can't solve one problem without solving the other. The solution is to offer great jobs that grow and change with the person. While this effort starts by posting more compelling jobs, it certainly doesn't end there. But that's still a great start.