Great quote from The Willpower Instinct from Kelly McGonigal. I'm just getting started and really enjoying it. [Emphasis mine]
Over the last decade, neuroscientists have discovered that, like an eager student, the brain is remarkably responsive to experience. Ask your brain to do math every day, and it gets better at math. Ask your brain to worry, and it gets better at worrying. Ask your brain to concentrate, and it gets better at concentrating.
- Kelly McGonigal, The Willpower Instinct
What are you asking your brain to do?