I've had a pre-planned vacations, but something else captured my mind, so much so that I've thought about cancelling these vacations and spending the time on the other thing. Good that I didn't! The other thing is a worthy thing to do for me, but that doesn't mean I should've sacrificed my plans. One thing I've found useful is to go with the flow. Board the booked plane, and see what happens next. The other, is to think that the planned stuff already happened, or imagine rewinding the tape (or calendar) further just after the planned stuff has happened. That happened, now what? For me in this case, I've realized that I can do the other thing after my planned vacation, and it will be just fine. Does timing really matter for that other thing? If it doesn't and it's not the most important thing in the world, just go with the flow. There are exceptions for this rule, sure. If something more important (or interesting) comes up, screw the plans. It also may be that by ignoring this other thing, the motivation will go away, or something even more urgent comes up. But if the motivation goes away, maybe it wasn't that important after all? The fact is, we don't know all that for sure, and we do know what we planned to do.