I preach the benefits of breaks regularly, but I'm still always surprised at how effective they are in my own life.
Today's story: I was on a three-hour train ride this morning, in which it was hard to take real "breaks" since I was boxed in my seat. I spent a solid two hours working on a framework, ending with something that felt OK.
The train arrived, and I grabbed a coffee and went to the bathroom. During that micro break, I had a breakthrough and completely rewrote everything in two minutes, creating something I love. (Yes, I thought of Uplift's central framework on the toilet.)
So today, if your work is just so-so, get up; change your environment. It might be just what your mind needs to break through.