[Firehouse]

Start with smart university leaders whose goals include the financial advancement of the institution. I cannot think of any pro-greek university where the chapters do not have strong alumni representation. Organized, influential alumni keep a guiding hand on the chapter, and they also make sure greeks have the ear of the admistration, and will not allow self-important lower level staff to browbeat the chapters.
Pro-greek universities recognize the value of fraternities and sororities as they relate to the alumni support of future generations.
Georgia Tech actually tracks financial contributions of alumni by chapter! Other universities I'd characterize as pro-greek include: Florida State, Central Florida, Florida, Missouri, Wofford College, Illinois, Purdue, Nebraska, both big schools in Kansas, Baylor, Texas Tech, Cal-Berkeley (surprising), USC, U-Pacific, Cornell, Penn State, Southern Methodist, Birmingham-Southern, Auburn, Tennessee. This is a very short list, just the ones that come to mind first.
It doesn't surprise anyone to see a few small, private schools strut their anti-greek bias. What does surprise is finding a school you'd expect to be evry pro-greek that turns out to be actively hostile. I've heard LSU is a good example. And, as strong as the chapters are at Ole Miss and Alabama, I'm told the administrations are overtly and covertly hostile to greeks. Too bad; those are great systems.
Policies? If you want a great system, then 1) make sure each chapter has involved alumni; 2) make rush as easy and unrestricted as possible; 3) get rid of the death penalty. If the members misbehave, then get rid of those memebrs but don't kill the chapter. That causes years of bitterness and hostility toward the school.