The word tomorrow identifies a destination that changes names when you reach it.

Tomorrow is a name for a place that renames itself on arrival. It never comes as tomorrow; it comes as today, with all the same difficulty and none of the promised ease, and the word keeps pointing forward to a condition that will not be there when you get there. Deferral is built into the vocabulary.

Watch what you have been putting there. If something has been tomorrow’s task for months, the honest move is to do a small piece of it now or to decide plainly that you are not going to. Either is fine. The indefinite postponement is what costs you, because it charges you the worry without ever collecting the work.