Working backwards from a date
A deadline on its own only tells you when the work stops. It says nothing about what today is supposed to look like, so the gap gets filled with a vague sense of urgency that rises as the date approaches and produces nothing useful until the last week. Splitting the total into a daily figure replaces that feeling with a number you can check against. Ninety pages in six weeks is 2.1 pages a day, or 3 pages on each working day. You now know by lunchtime whether today went the way it needed to.
Use the pace you had, not the one you want
The daily figure this page gives you is what the deadline demands. That is not the same as what you can deliver. Before you accept a plan, look at what you actually produced in the last week or two of similar work and compare. If the deadline wants 3 pages a day and your honest recent average is 1.5, the plan is already broken, and no amount of resolve will close a gap of that size. That is the moment to cut the total, move the date, or get help, while all three are still cheap.
Judging a plan against your own past output rather than your intentions is the same habit that makes project estimates land. It feels pessimistic because you are comparing against weeks that included interruptions, sick days and work you had to redo. Those weeks are the honest sample. The next six will contain their share too.
Build the buffer in
Plan to be finished at about 90 percent of the time available, not at 100. On a six-week deadline that hands you four spare days at the end, which is roughly what one bad week costs. Pace yourself against the earlier target and treat the real date as the point where the work must already be done rather than the point where it is still being finished. A plan with no slack in it fails the first time anything goes wrong, and something always goes wrong.
Recompute as you go. Every day you open this page the remaining amount is divided by the days actually left, so a slow week raises tomorrow slightly instead of hiding until the end. Watching that number climb is a much earlier warning than watching the date approach.