Take your mind off something
Definition 1 of 1
Pro Tip 1/3Stress Relief
The phrase is often used to suggest ways to relax and stop worrying about stressful situations. 
Take your mind off the exam by going for a jog.
Pro Tip 2/3Temporary Escape
It implies a short break from stress, not a permanent solution. 
Chat with a friend to take your mind off the problem for a while.
Pro Tip 3/3Activity Suggestion
The phrase is often followed by activities one can do to distract oneself. 
Take your mind off work by painting or reading a book.