When to Let Someone Go

I'm not a boss of anyone, but Craig Groeschel has a great top ten lessons that he has learned about firing people.  Here are the first 3: 

1. The right person in the wrong spot becomes the wrong person unless I do something about it.
2. If you’re always trying to develop someone’s weakness, you probably have the wrong person.
3. Keeping the wrong person to protect his feelings is unfair to you and to your team member.

Visit his blog for the rest.