Juan has a pretty good idea of when to run. There were quite a few guys who had green lights last year. It's just a matter of them running. I gave guys the green light a lot, but sometimes I was a bit upset when they didn't run. A real base stealer can run better when he feels he can run versus when you tell him to run.
If someone is doing a good job them you tell them they are doing a good job. If they are not doing a good job then you tell them that too without tearing them down and criticizing them in front of other people. If there is a problem you call them in to the office and you deal with it one on one.