rewire the brain

When you next find yourself eagerly setting off down some mental byway or back alley you have no wish to visit or re-visit, in other words when you find your brain using you rather than the other way around; simply shout NEXT and mentally push the 'next' button. Over time you will develop the ability to think about what you want to think about; and not what your brain, at a loose end, wants to ruminate endlessly upon.