I have a mostly infinite to-do list, so my work is never done. When I'm on a more well-defined project, I'll have a deadline and a set of things to do based on

I have a mostly infinite to-do list, so my work is never done. When I'm on a more well-defined project, I'll have a deadline and a set of things to do based on how fast I work and what we (me, the project manager, maybe the other developers on the project) think is reasonable. Several co-workers usually have a single project where work is lumpy. They can have a several-day to-do list one week, and be twiddling their thumbs waiting on other people the next week. I don't know anyone who gets a daily task list that isn't calibrated to their skill level.