Maybe television is different, so i'll defer to your decision, but in the world of feature films, there's nothing as satisfying as waiting 'til 3 weeks past deadline and writing the first draft in ten days of ignoring the fear-based adrenaline, focusing instead on the vision which was exactly as you saw it a year and a half before.
Still, a premature Coal Ila toast may be in order, at least accompanied by propitiations to the Goddesses that you find the inspiration and focus that you deserve, as well as a greenlight.
(This comment is not autobiographical. In my screenwriter days, i began at 9AM and worked diligently until 5:30 or 6:30, often with an hour of so for a mid-day refueling repast. Never once did i rely on inspiration at 3AM; never once did i rely on inspiration at 3AM; never once... OK, never once was i able to do more than wait 'til the last minute was long gone, and then write all night.) "Life shrinks or expands in proportion to one's courage." - Anaïs Nin
But when Yle-TV deadlines close, they close for another year. And I'm getting too old for these endless re-runs. The last series took 4 years to put in place, and the other series I'm proposing has been around for 5 - when we made the first pilot, during the setting up of a new movie magazine.
And in the B2B world there can be NO procrastination ;-) You can't be me, I'm taken