I face the same problem. I think it is a "business owner/entrepreneurial" syndrome (if not chronic disease). The shear number of "stupid" (according to our entrepreneurial mindset) tasks that are necessary to accomplish is often discouraging and a turnoff.

My method of getting over this syndrome is made of a few simple steps:

- make myself unavailable for some time (could be a couple of hours or 2 days). And if this is not possible resort to waking up at odd times like 4:30 or 5:00 AM where you have no chance of being disturbed.

- I get started by picking the easiest tasks and doing them almost mindlessly. That helps in making you feel good about yourself (i think the fact of achieving tasks must release some "feel good" hormone/chemical in ones brain, i call it the "good job candy") and once you start getting a taste of the good job candy : you effectively start building momentum.

- Once you build momentum you are usually good for going through the entire list, because having started with the easiest tasks, each next one you complete yields a higher dose of good job candy and thus more drive to dig into the harder tasks.

That being said, an even better (in the sense of it's efficiency) motivator is the near disaster situation during which i suspect most of us become supper efficient.