Check out the Sportskool videos by the Head Coach of the US Olympic Fastpitch team.
Here is a website link that is very good for getting tips and drills. You can also subscribe to her newsletter and keep getting updates from Cindy Bristow.
The clinic information was put together to help show some of the drills, techniques and tips, used within the Shakopee Girls Softball Association (SGSA). Please see the In-House Coaches Clinic Handout PDF file for viewing or printing your own copy.
Here are some sample worksheets you can use to help with player positioning.