If you want see the 'Hours Worked' prompt during ticket entry, ensure that the 'Auto Save Clock' option is *unchecked* for the desk under Service Desk / Desk Definition / Edit / General Info.  Ticket time gets reported on the 'Service Hours' report.  Also, the time entered on a ticket will automatically flow to Time Tracking, and you can also have the time flow to the Service Billing module.  Service Billing is a great way to get a look at time by Organization/Customer and by period.  See this help page and this help page for further details on the various Time Tracking and Service Billing options.

SWEET! Thanks Kevin, that's Just what I'm looking for. :D

Have you tried Time Clock? I use this tool for tracking time and project bills, not just bills, but it also tracks cost or expenses and project proceedings.

I recommend you try using Time Doctor. It’s a good tool for measuring how much time (automated) you spent working on the computer. It has multiple ways to confirm if the time tracked was real and the time was a genuine working time such as checking websites visited and software applications used on the computer.