I personally find Google Docs very useful for managing all my projects. It really makes it easy to exchange the project updates among other project members. You can also use it for managing your tasks (usually a To Do list).
Take a look at the spreadsheet here
Its better if you save a copy of this spreadsheet for future use.
Task ID: the ID if your task
Description: describe your task
Percentage: percentage of the task completed
Start Date: the date you started (mm/dd/yyyy)
End Date: the date you finished your task (mm/dd/yyy)