Give a little, get a lot. I was cleaning out my e-mail files and found this note from Jim Covert who raises an idea worth pondering. However, finding good staff is essential even for those with low turnover. In recent years I've found they are one of my best resources for staff. They know the bad parts of the job and re-applied anyway.
Less training is needed.
You know their weaknesses and hire them anyway. When each knows what's coming, it's easier to cope with job stresses. Even staff that left on bad terms have returned and been great. If you do, they'll help the re-hire succeed. Remember, people don't re-apply to a bad workplace so a positive climate is critical.