What Did I Do All Day?

As the IT manager (I’m also the entire department) of a 35 person company, I purchase/support/train on all computer/telephone/geeky things that we use to run our company. I also do billable network engineering for clients and wear several other hats, as is common for a small company.

Upper management would like a better idea of what the heck I’m doing all day, mainly the amount of time spent on “Hey, do you have a sec?” type of support. Does anyone have a suggestion on tracking the time these tasks consume?