And the flip side of that is sometimes we just can't focus for beans. I think one of the hardest skills to master is to focus explicably. Now there is a skill with unlimited applications. Being able to forget about the instrument and just play the music is the goal. On trumpet it is about as hard as it gets. But the more intentional focus we can bring to the practicing, the closer we can get to the goal. And it always helps to remember that we do this for pleasure, because we are driven to do it, and there is no sense whatsoever in yielding to a drive which doesn't make us happy.