This is reference material that would help you get started with basic call taking and job records. We do also recommend the tutorial video disk that came with Service Desk and referencing the SD manual as they were designed to work together.
Introduction to Callsheets Video
Entering a COD Work Request Video
Entering a Work Request Where the Paying Party is Different than the Service Location Video
Introduction to Quick Entry Templates Video
Entering a Work Request from a Repeat Customer Video
Callsheets: How to Handle Missing Streets Video
Introduction to Job Records Video
ServiceDesk Manual
rossware.net/MiniManuals/SdManual.pdf