From a post titled “How NOT to get discouraged with writing projects”:
Assume that what you’re working on will take longer than you think it should. The Modern Library Writer’s Workshop suggests that “the schedule for any project you undertake should probably be expanded by 50 percent over what you think is right.” By allowing yourself more time to work than you may need, you’ll reduce stress, enjoy the process more, and you won’t get overwhelmed by last minute details.
Essentially, this is saying if I think a project should take me a day, I should allot 1.5 days to work on it. To which, I laugh. If that were all, I’d be golden. In other words, I’m either grossly under-estimating project length, or I’m taking way too long to do stuff. Probably a bit of both. All I know is something’s gotta change!
The Remainder Table 