[Cushman]

I believe that is the point.

[matwood]

Not when you can't think about much else until you come back to it. I'm trying to get out of the habit of thinking about work 24/7. Leaving unfinished problems does not help my goal.

[TillE]

Any project is a series of unfinished problems.

If you have something on your mind, write it down - but don't actually finish the work.