Using CSI's for the First Time, Help!

My organization transitioned to Tessitura late last summer and as we are gearing up for our second season with Tess, I would like for my staff to begin using CSI's. (Note: I work at Ithaca College, so my staff are all students).  At this point, we haven’t used them at all, but I know there is so much they can do. I am working to determine what some of the “best practices” are for utilizing CSI’s. Specifically, I’m looking to use CSI’s for things like accessibility needs, seating requests and to track communication between our patrons and my staff. If anyone is willing to share their CSI "trees" (Categories, Activity Types, origins, resolutions etc), that would be tremendously helpful. I'm looking for as many different sets of examples as I can get. Feel free to directly email me at mblau@ithaca.edu. Thank you!