I dread moving, even though I've done it over 20 times in the last 25 years and I should be good at it by now.
Packing up and cleaning the old home is a task that kind of asymptotically goes toward the finished state. Every piece of effort you resolve reveals more effort behind it.
I try to solve this by amortizing the move over time so that full anxiety doesn't have to hit and I don't have to push myself to do the impossible and finish everything in one day. But because of that asymptote I still end up pulling an all-nighter to meet the deadline.