Some work is best shipped when it's done.
Most of the time, though, we produce useful, important work on time. When it's due.
If you're having trouble shipping, it might because you've hesitated to put a date on it. "Soon" is a very different concept than, "11:00 am".
If it's important enough to spend your day on, to pin your dreams on, to promise to yourself and others, it's probably important enough to guarantee a ship date.