keep mind on
keep (one's) mind on (something)
To continue thinking about, concentrate on, or remain focused on something. I tried to keep my mind on my work, but I couldn't stop thinking about what Sarah said to me last night. The boss told us to keep our minds on the company's goal after he asked us to start working Saturdays.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
keep one's mind on someone or something
to concentrate on someone or something. He is keeping his mind on Jane instead of his work. I find it hard to keep my mind on my reading.
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.