I’ll guess that 80% of meaningful work gets done in the last 20% of time left for a project.
Software bug counts drop. Papers magically extend in length with great polish. Videos are created and finished. Trips are planned. Home improvements are completed in the nick of time.
That final 20% is a magical time.
Deadlines are dreaded by many but I really like them. I like them so much I create artificial ones just to keep momentum high.
They keep me accountable to getting things done and ‘shipping.’