Hi,
Please find the bellow links .may be these will help you
https://community.dynamics.com/crm/b/richardknudson/archive/2011/12/13/tracking-and-scoring-user-activity.aspx
http://blog.ignify.com/tag/tracking-appointments-in-dynamics-crm/
If you find this helpful to you,please vote for my answer. thank you vasubabuk