The basic things that I expect from my golfing experience, are the same things I expect from any other service-based experience. Smile, be courteous, be attentive, and take account of what your customers are saying. I've been in the customer service game for a long time, and these are very simple, repeatable things that public-facing staff can do to ensure success. In golf, this applies from the clubhouse staff through to the greens crew.

Golf-specifically, empower your marshalls/rangers to have the tools to do their jobs effectively. Be courteous but firm. They are meant to be there to keep things moving. Give them the information to do that.

Take a hard look at your tee time allotments. 7 or 8 minutes looks good with a full tee sheet, but look back at how many times, and how quickly you get behind. Nothing frustrates people more than being told one time, and then having to wait beyond that time for no good reason. And nothing is more effective at chasing customers away than having +5 hour rounds. Give yourself 9 or 10 minute times, and throw in the occasional "starter's time". It may look like you're giving up money, but in the longer term you won't be. More flies with honey, etc...

The rest for me is personal preference and semantics. Everyone's views on course conditions, prices, etc., are different, so I won't go there.