It's been a hell of a year, and it's only June. It's likely to be rough for awhile. Courses across the US were shut down as early as March, and only in the last month have slow streams of players been allowed back on, and with stringent restrictions. No golfers means no revenue and boards are tightening the purse strings for supers. The problem is, if you want a viable course when players are back in full swing, you can't just stop maintaining it for a couple months. But, we've been here before. We learned some valuable lessons in 2009 and these are five important takeaways on what you can, and what you can't, sacrifice in a time like this.