The new routine becomes real through the second ordinary day, not the announcement.

Starting something is loud, and it borrows most of its confidence from the first burst of interest. The change actually takes hold on the second unremarkable day, when the novelty has gone, nobody is watching, and you do it anyway. That day looks like nothing and does most of the work. Announcements are pleasant, but they describe an intention rather than prove one.

Whatever you began recently, protect the plain repetitions rather than the launch; make the next unglamorous instance as easy as possible to finish, and let the routine prove itself by being dull.