When I read Better than Before book by Gretchen Rubin, I learned so many helpful tips and tricks, one of them is Power Hour for nagging tasks and this is how she defines them:

With this hour, I’d tackle only tasks where I had no deadline, no accountability, no pressure—because these were the tasks that weren’t getting addressed. That’s another Secret of Adulthood: Something that can be done at any time is often done at no time.
-Gretchen Rubin

According to Getting Things Done book, if a task takes less than 2 minutes do it now. If it takes more, write it down to free up mental space and have the list accessible to you to use whenever you have some time free time or for your weekly power hour. Gretchen downsized this rule in her one-minute rule in her book The Happiness Project.

Sometimes I have no idea how long a nagging task would take, so I use a stopwatch to time it and find out and most probably laugh at myself afterwards for all the times I felt burdened by it.

A recent example is when I wanted to add a subscription option to my blog but didn’t know how, so I set the stopwatch. It only took me 10 minutes to make it happen and I felt lighter after.

Another tip is that you can set a timer and decide beforehand that if the time is up and the task is not complete yet it is perfectly ok to stop the task too, or, if you get some momentum going, keep at it until it is complete.

Celebrate the progress either way.