time/task reporting

Hi, Ok, I admit -I'm lazy! Been asked to make a reporting tool, what and how many hours spent on Possible with a save option, to enable continuously adding during the week, before sending off by mail to manager and one self. Surely I'm not the first person looking at a similar tool, been searching a bit but not found example code to use for adjustment to suite my group needs. Anyone care to share or point me to a site where I can find this? Thanks