You have to focus your mind on living in the now.
With an effort he focused his mind on her question.
It took a few seconds before he could again focus his mind on the major problem.
You have a mission, he thought again, trying to focus his mind.
He turned to the paper to focus his mind on something other than personal problems.
For a moment she seemed unable to focus her mind on what had happened.
It seemed a long way away and he focused his mind with an effort.
He was the sort who could focus his whole mind on a single problem.
Stephen looked back at the letter to focus his mind.
It wasn't possible to focus her mind on what had happened.