I put partially completed tasks and some 'waiting for's' (like if I'm waiting for an outcome to see if the desired outcome has, in fact, been accomplished, i.e., plant tomato seeds) in parenthesis. If I delegate something to someone and need to follow up, the task (or more accurately, the task of delegating the main task) is marked complete, then I enter a new task to follow up with so and so about such and such. Or sometimes I'll just put the main task in parenthesis until I know that it has been accomplished by the person I delegated to. Hope this helps.