I used to belong to a guild before our move. We were officially a charity organization, and for tax purposes we were asked to report the hours spent on the quilts we donated. It took a concerted effort for me to keep track because up until that time it was a hobby and clock-watching wasn't part of that picture. I would keep a sheet of paper and a clock near where I was working and write the time as I started and stopped work. I was always surprised how much time it actually takes to make even the simplest, easiest small quilt.