Do it again because you did it wrong the first time. Correct the mistake, as much as you can, and attempt to avoid making that same mistake again.
Do it again because you did it right the first time, and yet despite your efforts, the results were not as you wished. Perhaps there were external forces. Perhaps there was a chaotic winds inpired by a toucan flapping its wings inopportunately in the Amazon basin. Perhaps an unforseen tragic cosmic event happened just at the critical moment, a sunspot or a radiation burst from a far galaxy finally reaching us, and the neutrons and photons and neutrinos reacted in the one in ten trillion ways they needed to in order to somehow subvert your efforts, and as a result, reduced your outcome to something unanticipated, undesired, unacceptable.
Do it again because you did everything right and got the results you wanted. It worked, didn’t it? You got what you wanted – the date, the publication, the promotion – and so why should you stop there? Do you have a vision for the next avenue of approach? Pursue then. Are you interested in seeking out alternatives, [illegible], accelerations of what you just achieved? Do those too, building on your success as what you have to make it more special.
But don’t forget, in the real thing in the first time, to celebrate what you have achieved. Do not assume that it is what is not; you wanted that – Do not dismiss it so cavalierly as unacceptable or unfortunate. There is no way to arrange your world in which you are both always leveling up and ever satisfied with your achievements. So take the time, now to celebrate, to bask in the glory of what you have done, to see yourself as an accomplisher of things, of good things, of the ways you attempt and compete for being something valuable in your life. There is more to be done, yes. There is an infinite amount. And thus it is worthwhile to stop and accept your accomplishments as a validation, a positive, a good thing that you have completed.
And then, when you have satisfied that itch for confirmation and endearment…
Do it again.